I've just finished reading Trevor Legate's excellent book on the GT40 and I have some questions about the 427 engines used in the LeMans cars fielded by Shelby American and Holman Moody. The book states that the '66 spec cars were using a 485bhp engine that weighed 550lbs. The '67 MkIV entrants had an upgraded 530bhp engine. The only other details I could find were that they used "aluminum heads" compared to the NASCAR 427's.
Which heads did these cars use? Were they the 427 "tunnel port" style or "high riser" heads? Did they all use single 4bbl Holley carbs? Any details on these engines would be appreciated.
Which heads did these cars use? Were they the 427 "tunnel port" style or "high riser" heads? Did they all use single 4bbl Holley carbs? Any details on these engines would be appreciated.