11-15-2019, 11:26 PM
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Join Date: Mar 2017
Location: ABQ, New Mexico
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The 427 used in the 1966 GT40 MKIIs were not the same as Ford used in it's NASCAR stock cars. Some of the differences were: aluminum heads with smaller intake and exhaust valves, 10.5 CR instead of 12.5 CR (because at LeMans you only got 101 octane gas), aluminum water pump, aluminum hub on the vibration dampener and dry sump oiling system. Horsepower was 485 vs 520. Surprisingly Ford used a standard 780 CFM Holley instead of 4 Webbers.
Last edited by Lee Stewart; 11-15-2019 at 11:29 PM.
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