Bob,
In an interview I saw back in the late 60s with Shelby and some of the Ford racing people they said the first GT-40s that never finished the races had some head bolt problems. Something about them not having been heat treated correctly or something and after they got hot they basically fell apart. I am not sure if this is actually the real problem but that was what the interview was about. Shelby also said that to this day the GT-40 racing program was the most expensive in history as Ford told them they had no limit to the money they could spend but they had better win or not return to the United States. I tried to find the tape of that interview as it was about 45 minute long but I either lent it to someone and never got it back or have misplaced it along with some other things that I amtrying to find.
Ron
