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Thread: Article: The Dennis Leech Boss 429 Mustang

  1. #41
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    Here is another photo of the Dennis Leech Mustang. Silverstone. July 1973.

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    (Ken Hyndman

  2. #42
    Quote Originally Posted by alfettafan View Post
    Finally, after literally years of searching i managed to find the copy of Auto Enthusiast magazine from May 1973 which featured the Dennis Leech Mustang. Attached below are the 3 pages scanned from the mag:-

    Hope it is ok to post here, cheers, Alistair
    Wow! Nice find, thanks so much for sharing.

  3. #43
    Just spotted this on the Mustang GB Owners forum, looks like the Big Hemi Boss is on its way back to the UK...

    https://www.mocgb.net/forums/showthr...942#post726942

  4. #44
    Thanks alfettafan, thats great news. The Dennis Leech Mustang is returning home. For years its been in a 'restored' state in the US which, while the car looks great, bares no resemblance to the way it was when Leech raced it: http://www.ponysite.de/dennis_leech.htm

    But I see on your link it shows that Bill Shepherd recently purchased it. Shepherd is a long time Ford historic racer, having raced a Cobra and Mustangs throughout the UK and Europe for many years. He also owns a large Mustang dealership. I've no doubt the Leech Mustang will be correctly returned to its period Group 2 guise.

  5. #45

    Leech Mustang Restoration Update

    But I see on your link it shows that Bill Shepherd recently purchased it. Shepherd is a long time Ford historic racer, having raced a Cobra and Mustangs throughout the UK and Europe for many years. He also owns a large Mustang dealership. I've no doubt the Leech Mustang will be correctly returned to its period Group 2 guise.
    Seeing the interest displayed here, I thought I'd drop this thread an update on the whereabouts and the plans that we have for the car. The Boss is now back in the UK and restoration has begun as of December 2018. We will, of course, be restoring it to the spec that it ran in for the 72/73 season sporting the 429 and fetching rootes turquoise livery. Bill has been in contact with Dennis regarding the car and amazingly he even had a bunch of spare bits for it! Hopefully, the Boss will be eligible to run in a couple of events once completed, but almost certainly It'll thunder up the hill at the Goodwood Festival of Speed, although maybe not this year.

    A big thanks goes to you Steve and also to Alistair (alfettafan). Your research posted here has been massively helpful for us in restoring the car. Thanks to everyone else too, It's great seeing that there are others out there that are just as excited/enthused about the Boss as we are!

    Cheers
    Fred Shepherd
    Last edited by Fred Shepherd; 03-04-2019 at 01:05 PM.

  6. #46
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    Thanks Fred for the update. I saw the car race at Silverstone in 1973 and the turquoise livery is stunning.
    I hope you don't mind me sharing this site;

    http://www.ponysite.de/dennis_leech.htm

    (Ken Hyndman)

  7. #47
    Thanks Fred for the update. I saw the car race at Silverstone in 1973 and the turquoise livery is stunning.
    Hi Ken
    Interestingly the Silverstone 73 race is one of the rare occasions I managed to find/buy a picture of the car in 429 spec, although the Javelin gets more of the spotlight here. This might bring back some memories?

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  8. #48
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    Fred,
    I took this one photo of the first lap at Silverstone. It looks like all these photos are at the same corner.
    I tried to crop my photo down and it is not clear but it is in colour and gives a wide view of the Becketts Corner at Silverstone in 1973.
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    Name:  Silverstone 1973.JPG
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    (Ken Hyndman photo)

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    A moment later at Beckett's Corner.

    (Ken H )

  9. #49
    Ken,

    Thanks for sending those across, much appreciated.
    Personally, I find that a fantastic photo as it shows a great deal of the atmosphere of the racing back in the 70s (something I unfortunately never got to experience). Great to see the marshall in a stripey jumper and bell-bottoms!

  10. #50
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    OK Fred,
    I recently found the original slide from that day.
    Name:  Silverstone. 1973...JPG
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    (Silverstone. British GP day. July 1973. )

    ( Ken H photo..)

  11. #51

    Ford falcon

    Quote Originally Posted by Steve Holmes View Post
    For 1972, Malcolm Gartlan Racing elected to run an RS2600 Capri for Muir. Gardner was back for a full campaign with the Adrian Chambers team, who’d now built a new ’70 shape Camaro. Dave Mathews was entered in a Broadspeed built BDA Escort run by Melton Racing, Dave Brodie was in another BDA Escort, and David Howes was armed with an AMC Javelin. Terry Sanger returned to the series, taking over the former Wiggins-Teape Camaro of Muir, while Martin Thomas was back with his similar car.

    Meanwhile, Leech decided more power was needed, and through Hollman-Moody, imported a sledgehammer 429 Boss motor for the Mustang. To fit the big 429 into the engine bay, the suspension turrets had to be modified. Initially, Leech ran the motor still fitted with a single 4-barrel Holley, but then fit it with alloy Gurney-Weslake heads, with four valves per cylinder. Leech then manufactured a slide throttle fuel-injection system for it.

    The Mustang, now sporting a crisp new metallic turquoise paint scheme, looked a million bucks, but this ambitious project would make for a very frustrating season. Having missed the opening round, Leech qualified 8th for Round 2, at Oulton Park, some 7sec off Muirs pole time in the Capri. But he worked his way through the field to be 3rd at the finish, behind Muir and Gardner. At Thruxton, for Round 3, the Mustang again lined up in 8th on the grid, and was still running at the finish, behind Gardner, Mathews, and Sanger. At Silverstone, Round 4, Leech finished a lap down, in 9th place, but at least he finished. He didn’t make the start in Round 5, at Crystal Palace.

    For Round 6, at Brands Hatch, the Mustang qualified 9th, and finished one lap down, in 7th. A dnf at Oulton Park ended a good run that began with a 3rd place on the grid, while more disappointment followed at the Silverstone TT, after he qualified 6th in a quality field which doubled as Round 8 of the European Touring Car Championship. He didn’t enter the next round at Mallory Park, and another dnf rounded out what had been a difficult season for Leech and his ambitious Mustang project.

    After the frustrations of the 1972 season, Leech ran only a limited campaign in 1973, the last year in which the BSCC was run under Group 2 rules. Muir had switched to a BMW GB backed 3.0 CSL, although this car struggled against Gardners SCA Freight Camaro, which for 1973 was fitted with the alloy 7.0 litre motor used by fellow countryman Bob Jane to win the 1971 Australian Touring Car Championship, in another Camaro. Leech made his first appearance in Round 5 at Silverstone, finishing 14th, two laps down, after engine issues.

    The last BSCC race for the Mustang was at the penultimate round, at Silverstone, for the Tourist Trophy, where Leech was involved in an accident in the first heat, and unable to start the second heat.

    With nowhere for the Mustang to race other than in the Special Saloons category for heavily modified sedans, the Mustang took the usual nose-dive in desirability as old race cars tend to do, and ended up doing a bit of ASCAR club racing, driven by Roy Pierpoint.

    Attachment 10765

    In the mid-1980s, Eric Walker purchased the Leech Mustang, complete with 429 motor and a spare 429 in bits (but missing the Leech built fuel-injection system) and added it to his growing collection of ‘60s and ‘70s American sedans to have competed in the BSCC, including the Terry Sanger Falcon Sprint, and Martin Birrane ’70 Mustang. All three vehicles were in original condition, as last raced, and showing the stresses brought about by years of being pounded upon. With nowhere to race them, Erics plan was to hold on to the cars until their values rose once again, then sell one of the Mustangs to pay for the restoration of the other. Unfortunately a divorce in 1987 forced him to sell the cars. The Falcon went to Sweden, while the two Mustangs eventually ended up back in the US.

    Attachment 10766

    Attachment 10767

    Although not a genuine Boss 429, the Dennis Leech Mustang is perhaps the only road race Mustang to have competed with a Boss 429 motor. Ultimately, the concept failed, but anyone fortunate enough to have seen this car race, will never forget it.

    The Dennis Leech Mustang is currently undergoing restoration in the US.

    My thanks to:

    Wolfgang Kohrn at www.ponysite.de

    Frank de Jong at www.touringcarracing.net

    Mike Hayward at www.mikehaywardcollection.com

    Eric Walker

    The original race photos in this article were kindly Mike Hayward. The later photos were supplied by Eric Walker.
    The falcon talked about here was returned to uk in early 90s . Then going through a full rebuild by fosstec engineering. Made a return to racing with myself in 2018 .

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