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McLaren M10B

John Cannon in the all-conquering Hogan-Starr Racing McLaren M10B in 1970. Copyright-free image distributed by Corel.

After the success of the M10A, Trojan announced plans to triple production to 50 cars for 1970. Motoring News (9 Oct 1969 p18) reported that the M10B "closely resembled" the M10A but incorporated many of the modifications made to the M10A during the 1969 season, including "redesigned front and rear suspension, re-styled body fairing, a new cooling system using an aluminium radiator, wheel sizes changed to 11in low off-set front and 16in rear". Also the tub "has been lightened and modified to accept immediate installation of a dry sump engine".

The prototype car won the 1970 and 1971 US championships, making it the most successful individual F5000 car of all time.

Eoin Young, in his book Bruce McLaren: The Man and his Racing Team (Eyre & Spottiswood, 1971) says that 21 M10Bs were built and records from a parts supplier confirm this by showing that coil/shock units were supplied for M10B 400-01 to 400-21. However, research by Duncan Fox shows that many of the early season M10Bs had M10A style tubs.

Alongside the research into the Lola T332, this McLaren M10B project is the most complex in the F5000 section. Thanks to Ian Hebblethwaite, Michael Kacsala, Duncan Fox, Steve Wilkinson, Tony Nicholson, Malcolm W. Starr, Bruce Leeson, Marcus Pye, Clive Bracey, Noel le Tissier, Mike Allison, Malcolm Page, David Pearson, Aaron Lewis, Tim Barry, Peter Lindenberg, Jim Griffin and Edd Ozard for their help so far. All and any further help would be gratefully received. Please email Allen at allen@oldracingcars.com if you can add anything.

Car	History	Current owner
McLaren M10B 400-01	John Cannon's Hogan-Starr Racing McLaren M10B is pushed through the Laguna Seca paddock in June in 1970. Copyright Mark Manroe 2006. Used with permission. To Malcolm W. Starr: first seen as spare car for John Cannon US 1969 R13 Sebring. Then merged team of Carl Hogan and Malcolm W. Starr as Hogan-Starr Racing US 1970 for John Cannon (won championship); Tasman 1971 for Cannon; US 1971 for David Hobbs (won championship). Advertised by Bill 'Murph' Mayberry at Hogan Racing (Newton Square, PA) Dec 1971 ... Unknown in 1972 ... Bryant Ingalls (Conklin, NY) used in SCCA racing 1973 and 1974. Advertised Mar 1975. Advertised ('ex-Hogan') by Clifford Racing (Dublin, PA) 22 Nov 1975. Subsequent history unknown but in the Crawford Auto-Aviation Museum in Cleveland, Ohio in 2004.	Crawford Auto-Aviation Museum (US) 2004
McLaren M10B 400-02	Gil Cameron in the M10B at Oran Park in Feb 1976. Copyright Glenn Moulds 2005. Used with permission. Neil Allen (Australia): won on debut late 1969; Tasman 1970; Tasman 1971. Allen then announced his retirement and the M10B, together with Allen's spare chassis, were advertised from 31 Mar to 7 May 1971 - Kevin Bartlett: Australian Gold Star 1971; Tasman 1972; March 1972 (Bartlett gets T300 in April), US R2 (7 May 1972) ... Gil Cameron (Aus) from Apr 1975; 1976; 1977 . Subsequent history unknown but reported to e one of the cars owned by Lyndon Reithmuller in 2007.	Lyndon Reithmuller (Aus) 2007
McLaren M10B 400-03	Roy Lane in his new M10B at Junction at Doune in June 1971. Copyright Steve Wilkinson 2006. Used with permission. Alan McKenchnie for Mike Walker UK 1970. The monocoque was replaced (by 400-18S) so that Walker could get the lower engine mount specification used by Gethin and Ganley. The 400-03 chassis to Roy Lane and built up with 5.5-litre Chev for the British Hill Climb Championship 1971 (11 run-offs and three wins; fourth over all in the championship). To Richard Shardlow: British Hill Climb Championship 1972 (11 run-offs with best result 5th at Prescott but then rolled at Harewood 10 Sep 1972). Not rebuilt and eventually sold late 1973 to John Bailey. Rebuilt with 5.5-litre Chevy and LG600 and used in Sprints during 1974 and 1975 (e.g. Duxford Sprint Oct 1974 and a win at Curborough August 1975). To Harry Phillips (Coventry) wins libre races at Llandow in 1976: two in April , one at the end of July and one at the end of September. Such a car appeared at the Birmingham Round the Streets in 1979 or 1980. Surely not the same car. Labeled "Techcraft" according to Allen Brown who saw it that day. Then unknown until sold in 1984 by Ian Webb to Roger Ealand. Raced by Ealand in 1985 and advertised later that year. Subsequent history unknown but note that this car shows distinct similarities to the Ean Pugh car.	Unknown
McLaren M10B 400-04	Jim Moore's ex-Prophet McLaren M10B at Mallory Park in July 1973. Copyright Stuart Dent 2006. Used with permission. David Prophet: UK 1970 (16 race + 2 DNS); libre 1970 (won at Silverstone 5 Sep 1970); Argentinean GP Jan 1971; UK 1971 (14 races); libre 1971 (2 wins at Silverstone); UK 1972 (13 races + 1 DNS); libre 1972 (2 wins at Silverstone) - Jim Moore: UK 1973 (3 races); libre 1973 (1 win at Castle Combe and 2 at Silverstone). Not seen again. The subsequent history of this car is unresolved as there are three claimants to this identity. See the "ex-David Prophet" cars. Contemporary race reports strongly suggest that Prophet rebuilt his car on a number of occasions and may have used two or more tubs. One of those tubs is understood to have gone to Roy Lane at the end of 1970 although his 1971 hillclimb car wore the plate 400-03, not 400-04. Thus, it is possible that all three of these cars have histories back to 1970.	Not yet established
McLaren M10B 400-05	Howden Ganley being prepared for practice at Thruxton in August 1970. Copyright Keith Lewcock 2009. Used with permission. Reto Kuprecht at the Salzburgring Classic in August 2007. Copyright Udo Leischner 2007. Used with permission. Barry Newman for Howden Ganley: UK 1970 (18 races, five second places) - Gordon Spice: Argentinean GP 1971; UK 1971 (11 races + 1 DNS); rebuilt as 'Kitchmac' by Tony Kitchiner for 1972 season: driven by Gordon Spice (UK: 7 races + 1 DNS), John Kendall (UK: 2 races; US : 1 race only R3 Watkins Glen), Fred Saunders (UK: 1 DNS only), Alan Rollinson (UK: 1 race only), Roger Williamson (UK: 3 races); UK 1973: driven by Kaye Griffiths ( 1 race only), Richard Knight (5 races + 1 DNS). Not seen again after the end of 1973. It has been reported that this car was wrecked in an accident but it appears to have survived its final race in 1973 intact. Subsequent history unknown but another car has been sold by Howden Ganley bearing this chassis number. This was bought by Reto Kuprecht (Zurich, CH) in 2003. Retained 2007.	Believed wrecked. Replacement car with Reto Kuprecht (CH) 2007
McLaren M10B 400-06	Sid Taylor's crew work on Peter Gethin's McLaren M10B at Thruxton in August 1970. Copyright Keith Lewcock 2009. Used with permission. Sid Taylor UK 1970: driven by Peter Gethin (13 races, 8 wins), Derek Bell (1 race) and Reine Wisell (6 races, 3 wins) - Keith Holland late 1970: Australian GP Nov 1970; Tasman 1971 (3 races); UK 1971 (dropped in the lake at R1 Mallory Park 28 Mar). At this point the history of this car divides, with a replacement tub forming the basis of a new "M10H" from R3 Brands Hatch on 12 Apr but the original also returning at some point to make two cars. Research conducted by Duncan Fox using photographs of Holland's car strongly implies that the original tub was in the "M10H" at some point. The two cars resulting from this period of confusion are shown below as 400-06(A) and 400-06(B). Just to make it more interesting, Tony Garmey (Seattle) has seen a bare tub in that city with a '400-06' chassis plate.	Split - see below
McLaren M10B 400-06(A)	A car built up by Keith Holland late 1972 or early 1973 using, it is believed, the original 400-06 tub. To Chris Oates (Ripley, Derbyshire) 1972 and entered for late-season F5000 races but did not appear. Entered for four races in 1973 and turned up for two but did not record a time on either occasion. Sold to Spencer Elton (Westbury, Wilts) 1973 and advertised "1973, unraced" in October alongside the other ex-Holland car, now also ex-Baker. Sold to Dave Harris (Bristol) for sprints. At some stage, the car had been updated with M14 suspension. Harris: British Sprint Championship 1974 (6 races, 2 wins and 2 2nds; 2nd in championship); British Sprint Championship 1975 (9 races, 4 wins and 3 2nds; won championship); British Sprint Championship 1976 (8 races, 3 wins and 1 2nd; won championship). According to the car's papers, the M10B then went John Taylor for 1977. Taylor entered it for the opening Sprint round at Longridge but did not arrive. He later raced at Wroughton on 31 July 1977 (14th in class), and Colerne 30 July 1978 (15th in class); in 1978 the car was listed as an M10B/14. The car's papers give the next owners as Robin Darlington (1977-78) and Michael Lavers (1979). The car was advertised in Jan 1979 from a Bridgewater number. The papers then continue with John Peskett (1980-1990), Rick Hall of Hall & Fowler (1990-1993), Mike Barretta (Munich, Germany, 1994-2000) and Mark Longmore (since 2000). Raced by Matthew Wurr in historics. Retained 2005.	Mark Longmore (UK) 2005
McLaren M10B 400-06(B)	Keith Holland's replacement car: UK 1971 (8 races) during which time it was modified along the lines of McRae's successful car; UK 1972 (9 races) including a crash at Brands in Apr after which the car was even further modified and dubbed "M10H". By Jul 1972, the car had side radiators, a wedge nose and had been lengthened by 3½in. Sold to Clive Baker Aug 1972: UK (5 races); UK 1973 (2 races + 1 DNS). Via Chris Oates to Spencer Elton (Westbury, Wilts) late 1973 and advertised. To Stephen Cuff (also Westbury, Wilts) late 1973 and advertised with a 5.7-litre Chev Jan to Apr 1974. To Bob Leckie (Aberdeen): libre 1974 (entered for an Ingliston libre May 1974, 2nd at Fintray 30 Jun 1974, unplaced in libre at Ingliston July 1974). Advertised during 1974 but not seen again. Spencer Elton recalls that Leckie converted the M10B to a Skoda Super Saloon. Subsequent history unknown.	Unknown
McLaren M10B 400-07	David Good for British Hill Climb Championship 1970 (at Prescott 10 May 1970) - Richard Thwaites 1971, 1972 (dominated early season non-championship events e.g. AS 20 Apr 1972 p47 - 5.0-litre), 1973 (5.7-litre or 5.8-litre in 1973) - sold July 1974 to Martyn Griffiths (Arley, Worcs): British Hill Climb Championship 1974 and 1975 (had second M10B during 1975 - 9th at Barbon Manor 24 May 1975 having damaged the monocoque of one car at Pontypool at the end of April); advertised Sep 1975 and Mar 1976 - Godfrey Crompton (Tenbury Wells, Worcs) 1975 or 1976: hillclimbed; crashed Loton Park Aug 1976 - Keith Cox (Halesowen, W Mids): bought as crashed, rebuilt, then hillclimbed - John Peskett (Leicester) 1977: unused in collection, with 400-06(A), M10A 300-16 and other F5000s - Rick Hall - Jeffrey Pyett (Oundle, Peterborough) 1989 - Richard Eyre (Rayleigh, Essex) 1991. Retained 2002. Duncan Fox has owner listed as Bruce Monoset 2004.	Richard Eyre (UK) 2002
McLaren M10B 400-08	Kipp Ackerman in the M10B at Bulawayo in 1970. Copyright Doug Brown 2005. Used with permission. Kipp Ackerman: SA 1970 (7 races); SA 1971 (8 races); SA 1972 (9 races + 1 DNS, best finish 3rd); SA 1973 (9 races); SA 1974 (4 races + 1 DNS). Later sold to the Smiths family, who own a big wheel and tyre franchise in South Africa. Sold by Theo Smith to Peter Lindenberg in 2003. Undergoing a total restoration in 2009 expected to be complete in August.	Peter Lindenberg (SA) 2009
McLaren M10B 400-09	The original owner of this car is unknown but it is likely to be the car of Eppie Wietzes.	Unknown
McLaren M10B 400-10	Graham Wadsworth's ex-Matich McLaren M10B on display at Sandown Park in November 2006. Copyright Greg Brewer 2006. Used with permission. Frank Matich (Australia) and fitted with Repco-Holden V8: raced at Warwick Farm 12 Jul 1970 but crashed and rebuilt on new tub as "M10C". Next raced at Calder on 18 Oct 1970 (won), then at Australian Grand Prix 22 Nov 1970 (won); Tasman 1971 (7 races, 1 win and 3 2nds); US 1971 (2 races only: won R1 and 2nd at R2); Australian Gold Star 1971 (crashed prior to Oran Park 27 Jun and rebuilt on third tub; 3 races, 1 win); driven by Colin Bond Aus GP Nov 1971 - Frank Radisich at the end of 1971: Tasman 1972 (8 races); Australian Gold Star 1972 (1 race only); Tasman 1973 (3 races + 1 DNS) - Keith Laney (NZ) fitted Chevy V8: Tasman 1974 (1 race only); Tasman 1975 (1 DNQ only) - Dennis Phillips for hill climbs 1976 - Russel Greer (Blenheim, NZ): fitted with 6.3-litre Chevy and won 1979/80 NZ hill climb championship - Peter Addison (Aus). History then unknown until acquired by Max Warwick (Aus) in the mid-1990s. Sold Graham Wadsworth (Melbourne, Aus) 2006. Retained 2007.	Graham Wadsworth (Aus) 2007
McLaren M10B 400-11S	Graham McRae: UK 1970 from R2 (13 races + 2 DNS, 1 win); Tasman 1971 (7 races, 3 wins); UK 1971 (7 races + 1 DNS, 3 wins); crashed at Hockenheim Sep 1971 and destroyed.	Destroyed
McLaren M10B 400-12	Richard Weiland in his McLaren M10B at the Nürburgring in 1990. Copyright Norbert Vogel 2007. Used with permission. Bob Rose (Solihull) for UK Sprints, mainly at Curborough. Debut 18 Apr 1970 at Curborough; British Sprint Championship 1970 (3 events, 3 wins), 1971 (4 events, 4 wins), 1972 (8 events, 4 wins) and 1973 (3 events). To John Ravenscroft: UK sprints 1974. Heavily damaged ("suffered a broken chassis") Curborough 8 Sep 1974 and reported to have been written off. Returns in 1975 (still said to be "ex-Rose") and advertised in September that year. The "ex-Rose" M10B was later advertised by Tom Fletcher (Helsby) in 1984 still with its 5.7-litre Chev. Next seen with Richard Weiland (Germany) 1990. Sold to Hans Arnold (Germany) 1997. Retained 2001.	Hans Arnold (Germany) 2001
McLaren M10B 400-13	Steve Durst (Elkins Park, PA): SCCA Nationals (won at Portland 3 May); US 1970 (#36 blue; debut at R2 Edmonton 24 May: 5 races). Durst crashed at R8 St Jovite on 1 Aug and missed the last five races of the season, implying that the car was significantly damaged. The car is next seen in 1987 when Chuck Haines sold it to Mike Allison, then GM for Skip Barber Racing. It was fully restored by Charlie Gibson of Sasco Motorsports and raced by Allison until sold to Mike Yanchek in 1988/89. Yancheck lodged the car in the Novi Racing Museum in Michigan for some time. Following Yancheck's death in the mid 1990s, the car was stored until it was one of three cars sold by his widow to VJ Mallya's collection in June 2005. It is now lodged with Tony Nicholson's Robin Automotive (Sonoma, CA). Retained 2007.	VJ Mallya (in US) 2007
McLaren M10B 400-14	Gregg Young's McLaren M10B at its first appearance - Laguna Seca June 1970. Copyright Mark Manroe 2006. Used with permission. Gregg Young: US 1970 debut at R4 Laguna Seca 14 Jun (9 races: best finish 6th at Sears Point 28 Jun); for Carlos Marincovich at Argentinean GP Jan 1971 - Agapiou Brothers for AJ Foyt at Questor GP 1971 (also practiced by Jackie Stewart). Subsequent history unknown but likely to have been the first Ott car which was wrecked a month later.	Wrecked?
McLaren M10B 400-15	Team Broadspeed [Ford engine] for Chris Craft UK 1970 (debut R11; later damaged in workshop fire) - Sid Taylor [Chev engine] UK 1972: driven by Brian Redman (6 races + 1 DNS, 2 wins); US 1972: driven by Derek Bell (R3 Watkins Glen 18 Jun and R4 Elkhart Lake) and John Cannon (R5 Donnybrooke). Sold by Jerry Entin to Micky Fowler after R6 Road Atlanta 20 Aug 1972 and entered at R8 Riverside 24 Sep 1972. Micky Fowler US 1973 (1 race + 1 DNS); SCCA Nationals 1973 (won at Riverside); US 1974 (one appearance only); US 1975 (1 DNS only); SCCA Nationals 1975. Not seen again. Subsequent history unknown.	Unknown
McLaren M10B 400-16	Paddy Driver's ill-fated McLaren M10B at Kyalami in 1971. Copyright David Pearson 2007. Used with permission. Unknown in 1970. Paddy Driver: SA 1971 (11 races, three 2nd places), 1972 (1 race only: wrecked at Killarney 8 Jan 1972 after tangle with John McNichol's M10B). Rebuilt on new chassis - see 400-16(B). Original chassis later repaired as 400-16(A).	Destroyed
McLaren M10B 400-16(A)	Simon Hadfield in Sean Mooney's McLaren M10B at Donington Park in 1990. Copyright Norbert Vogel 2007. Used with permission. Original car repaired and rebuilt. Driver believes he sold this to Mike Domingo but isn't sure. This tub then probably used to rebuild 300-15 at some point - probably after it caught fire at some time. The resulting car would have been a real bitza but it makes more sense to regard it as 400-16(A) than 300-15-2. Possibly the Domingos' 1974/75 M10. Subsequent history unknown. From Bryan Tyler to Sean Mooney. Appeared at Coys in 1999, now owned by Sean Mooney. To Wolfgang Bscher and subsequently to Graham Earl: raced in historics 2000.	Graham Earl (UK) 2001
McLaren M10B 400-16(B)	Nolly Limberis in 400-16(B) at the 1975 Rand Winter Trophy. Copyright Michael Oliver 2004. Used with permission. New car built after the original 400-16 was wrecked using an unnumbered replacement chassis from Trojan. Paddy Driver SA 1972: from Welkom 22 Apr 1972 (); SA 1973. Then to Nolly Limberis SA 1974; SA 1975 - unknown owner - Willie Hepburn - Paddy Driver (again) mid 1980s. Presently being rebuilt in Jo'burg for Driver.	Paddy Driver (SA) 2002
McLaren M10B 400-17	John McNicol in the side-radiator 400-17 at Kyalami in 1972. Copyright Michael Oliver 2004. Used with permission. Unknown in 1970. John McNicol SA 1971, 1972 - Derek Tunmer SA 1973 - Billy Scheepers SA 1974 - Boet Poelser SA 1975 (not the car raced by Len Booysen - see 400-18S) ... Willie Hepburn - Paddy Driver (again) mid 1980s - Rennie Mackrory. Retained 2002.	Rennie Mackrory (SA) 2002
McLaren M10B 400-18S	Mike Walker's McKechnie M10B at the Oulton Park meeting in September 1970. Copyright Alan Cox 2006. Used with permission. Alan McKechnie to replace 400-03 (a replacement monocoque that allows the engine to sit lower): UK 1970 for Mike Walker - John Butterworth: UK 1971 for John Myerscough and Guy Edwards (Victory Race only); UK 1972 for Edwards - Mike Domingo (South Africa) 1973 and raced by Joe Domingo 1974. Then raced by Len Booysen in 1975 for Team Domingo. To Rennie Mackrory late 1980s ... going to a Duncan Fox customer in New Zealand 2002 ... being "worked on" by Fox for owner Frank Karl (NZ) in June 2007; retained 2009	Frank Karl (NZ) 2009
McLaren M10B 400-19	Spare chassis supplied to Neil Allen. According to Trojan records, it was numbered 400-19 and delivered 28 Jul 1970. The car does not appear to have had a chassis number and is believed to have shared the number '400-02'. Built up as complete car by Allen and Peter Malloy and, after Allen's retirement, advertised 31 Mar to 7 May 1971 - Allan Hamilton: Australian Gold Star 1971 - Pat Burke Racing for Warwick Brown Tasman 1972. Also March, April, May, Aug, Oct, Nov, Dec 1972 (Brown gets T300 Jan 1973); Trojan Racing for Bob Muir Tasman 1973; Team Target for Warwick Brown (Aus) Gold Star from Oct 1973. Suspension and other parts used for Bryan Thomson 's VW Sports Sedan which debuted at Calder in January 1974. The M10B tub was later rebuilt into a complete car and went via Paul Trevethan to Lynden Reithmuller. Subsequent history unknown. Note that the Formula 1 Register books record 400-19 as being the replacement M10B used by Keith Holland 1971-72 (from R3 Brands onwards, replacing car crashed at R1 Mallory). See 400-06(B) above.	Lynden Reithmuller (Aus)
McLaren M10B 400-20	Racing Team VDS for Teddy Pilette: Tasman 1971, UK 1971, Tasman 1972. To Pierre Soukry 1972. Subsequent history unknown.	Unknown
McLaren M10B 400-21	Ray Allen returns 400-21 to the paddock after the 18 September 1971 Oulton Park F5000 race. Copyright Alan Cox 2009. Used with permission. Edd Ozard in the ex-Santo, ex-Griffin McLaren. This is probably a SCCA Regional at Laguna Seca in 1978. Copyright Edd Ozard 2009. Used with permission. Team Trojan for Ray Allen UK 1971 (13 races + 1 DNS) - Bobby Howlings 1972: raced in Croft libre 19 Mar and at Mallory Park 26 Mar Rothmans round - Clive Santo UK 1972 (12 races + 1 DNQ at Rothmans 50,000 and 1 DNS at last race of season). Sold to Jim Griffin (San Francisco, CA) May 1973 less engine but with DG300 and a damaged spare tub. First raced mid 1974. Advertised "the last ever built M10B" 27 Sep 1975. Raced in SCCA Nationals 1976 (only one known race: Sears Point 25 Apr 1976); SCCA Nationals 1977 (only two known races: Sears Point 24 Apr 1977 and Laguna Seca June Sprints 25 Jun 1977) but also extensively in SCCA Regionals. Sold to Edd Ozard (San Jose, CA) 1978: tested once and raced just twice, winning at Laguna Seca first time out and crashing heavily at Laguna next race. Edd recalls that he "took off a fair amount of suspension front and rear" and that he then sold it "in a basket". Jim Griffin's recollection is that the car went from Ozard to Robert Barton in Lakewood, CA. Subsequent history unknown but the tub reported to be in California in 2004.	Unknown (US) 2004

The "ex-David Prophet cars"

Three cars claim the identity of David Prophet's car and those are explored separately here.

Car	History	Current owner
McLaren M10B 'the Ean Pugh car'	Ean Pugh in his beautifully restored "ex-Prophet" M10B 400-04 at Brands Hatch in 1992. Copyright Norbert Vogel 2007. Used with permission. An "ex-Prophet" McLaren M10B has been owned since at least 1991 by Ean Pugh (Wales & Monaco). Retained 2006.	Ean Pugh (UK) 2006
McLaren M10B 'the Bruce Leeson car'	A car owned by owned by Bruce Leeson (Carmel, CA) since 1991. This car's HSCC papers state a continuous history back to Prophet and Moore via Noel le Tissier. Owners after Le Tissier are given as Phil Chapman & Phil Keefe ... Ian Webb ... John Peskett (1982-1987) - John Beasley 1988 - John Harper 1988 - Rick Hall of Hall & Fowler (Bourne, Lincs) 1988 - Richard Schoenfield (Huttontown, NY) February 1990 and then Leeson in August 1991. John Harper advertised an "ex-David Prophet restored rolling chassis" in May 1988. Raced by Leeson in the Formula 5000 Tasman Cup Revival at the Australian GP meeting 28 Mar 2009.	Bruce Leeson (US) 2009
McLaren M10B 'the Barry Davison car'	An "ex-Prophet 400-04" was acquired from Roy Lane by Barry Davison (Buckinghamshire, UK) March/April 2006.	Barry Davison (UK) 2006

The 1972 production cars

In February 1972, Peter Agg at Trojan advertised a pair of M10Bs - "two complete brand new cars as frustrated export order". One of these is presumably the car that went to Bill Wood two months later but the fate of the other is unknown. Eoin Young's biography of Bruce McLaren says that Trojan built 21 M10Bs. This could either mean that the number 400-13 wasn't allocated for superstitious reasons and that 400-22 was the last car built, or that 400-13 was included but these two 1972 cars were built too late to appear in the book. As the book was published in 1971, the latter hypothesis appears most likely.

Car	History	Current owner
McLaren M10B 400-22	Sir Nick Williamson driving Tony Bancroft's McLaren M10B at Prescott in Sep 1974. Copyright Steve Wilkinson 2006. Used with permission. Don Robinson in the M10B at Harewood on 6 July 1975. Copyright Steve Wilkinson 2006. Used with permission. Built April 1972 for Bill Wood: UK club racing 1972 (used regularly in club races at Croft and Rufforth) - Tony Bancroft 1973, fitted with 5-litre Alan Smith Chev V8: British hill climbs 1973; British hill climbs 1974 (mentioned in preview Autosport 28 Mar 1974 p48, also at Barbon Manor Autosport 6 Jun 1974 p43 and Doune AS 27 Jun 1974 pp54-55, 2nd BTD Scammonden BARC AS 4 Jul 1974 p55, Harewood RAC 7 Jul 1974 AS 11 Jul 1974 p53). Advertised as 400-22 5 Sep 1974 p58. Prescott 1 Sep 1974 (AS 5 Sep 1974 p30) where it was also driven by Sir Nick Williamson as he was still suffering oil pressure problems on his regular Marlyn-DFV. BTD at Scammonden 15 Sep 1974 (AS 26 Sep 1974 p61). Harewood BARC 30 Sep 1974 (AS 3 Oct 1974 p52). Castle Howard AS 17 Oct 1974 p48 "in the McLaren which he has sold to Don Robinson". Don Robinson British Hill Climb 1975 (10th in 5.7-litre M10B at Barbon Manor 24 May 1975); 1976: crashed at the Easter Harewood (AS 22 Apr 1976 p39 and Mason p276). The car was said to have been written off.	Wrecked

The US mystery cars

Of the early US M10Bs, only Eppie Wietzes' car remains to be explained. This coincides nicely with their being only one chassis number to explain, 400-09.

Car	History	Current owner
McLaren M10B (1970-1971)	Eppie Wietzes at Westwood in 1970. Copyright Murray Chambers 2007. Used with permission. Eppie Wietzes (Thornhill, Ontario): US and Canada 1970 (#94 white-and-red; debut Harewood Acres 10 May 1970; 16 races in total). Said in a Wietzes column to have been sold to "John Merriman" (presumably John Maryon) for Al Pease to drive in 1971. To Dennis Ott (replacing earlier car wrecked at R2 Laguna Seca 2 May 1971): US 1971 (R3 to R6), SCCA Nationals 1971 (last seen Phoenix 26 September 1971). Subsequent history unknown.	Unknown

Only four M10Bs appear in the US in 1970. Carl Hogan retains his team's 400-01; Wietzes white-and-red car goes to Merriman then to Dennis Ott; Durst's blue 400-13 is believed to have gone into SCCA racing but its owners are currently unknown; the Agapiou Brothers' ex-Young 400-14 also goes missing. The only unexplained 1971 car is Ott's original car, the one he wrecked at Laguna Seca. This is logically either Durst's 400-13 or the ex-Young/Agapiou 400-14 but that still leaves one car unexplained.

In 1972 Sid Taylor imports another M10B (400-15) to muddy the water. Ott had two cars at the end of 1971 but these now vanish. The ex-Hogan 400-01 appears to have stayed in the North East corner of the US and 400-15 stays with Fowler until 1975. Kevin Bartlett's 400-02 does not seem to have stayed in the US after his visit in 1972 but Clive Santo's 400-21 goes to the US in 1973.

Note also that some of the M10As, notably Merle Brennan's and Patrick Garmyn's, were being described as M10Bs but Brennan's car appears at the same race as McGinty's once.

M10Bs in US vintage racing

David Hankin ran a car in vintage racing in 1994 (#10 'McLaren Cars').

The UK mystery cars 1971-1978

With so many M10Bs remaining in the UK and each car apparently remaining active for a number of years, the picture is complicated and confused. The notes that follow may look a hopeless jumble but are, as a wise man once said, 'the right notes, but not necessarily in the right order'.

Other references appear in 1972.

At the end of 1973, eight M10Bs were in the UK: Shardlow's ex-Lane 400-03 (on its way to Bailey), Jim Moore's 400-04 (later to Le Tissier?), Tony Kitchiner's "Kitchmac" 400-05, Chris Oates' modified "M10H" (on its way to Harris), Clive Baker's side-radiator "400-06" (on its way to Leckie), Thwaites 400-07 (on its way to Griffiths), Bob Rose's 400-12 (on its way to Ravenscroft) and Tony Bancroft's 400-22 (retained). Pierre Soukry's 400-20 had gone to France and probably stayed there and Clive Santo's 400-21 had gone to the US. In addition, the ex-Sir Nick Williamson M10A was just in the process of going missing for a season (1974) before joining 400-07 with Griffiths.

So, if we exclude Soukry's car, only the Kitchmac vanishes at (or by) the end of 1973. However, it looks as if one or two new cars had been built either by Trojan or outside.

1974 M10B competitors: Bailey (400-03), Harris (400-06A), Leckie (400-06B), Griffiths (400-07), Ravenscroft (400-12) and Bancroft (400-22). Jim Moore's 400-04 appears to go Tom Coughlan and Noel le Tissier in 1975 but may already be with Coughlan in 1974. Later in the 1974 season, John Wallwork had a "F5000 McLaren" at the IoM sprint.

1975 M10B competitors: Bailey (400-03), Coughlan & Le Tissier (400-04?), Harris (400-06A), Griffiths (400-07), Ravenscroft (400-12) and Robinson (400-22). Note that Simon Riley's "M10B" was M10A and Griffiths' second car, later with Richard White, was M10A 300-08. Paul Gardner was mentioned running a M10B at a Longton sprint; was this his M4B?

1976 M10B competitors: Phillips (400-03), Harris (400-06A), Godfrey Crompton (400-07) and Robinson (400-22 wrecked). There is no mention of Coughlan & Le Tissier's car (400-04?) in 1976 but it's probably still with them. The career of Ravenscroft's 400-12 appears to have ceased but that might be the car of fellow Sprint specialist John Wallwork.

... and later...

Note that the advert in Autosport in early 1975 for a F5000 McLaren in Newington, Kent was for Allan Kayes' McLaren M14A, not a M10.

Other relevant cars

These histories last updated on 10 January, 2010 .