Originally Posted by A_Harman
The bigger problem is that Ken Miles' death is shown in a GT40, but he died testing a J-car.
To the movie maker's credit, they did mention the new honeycomb material unique to the J-car, kind of indicating it was a J to the audience (later revised version to be the GT40 MkIV).
Looks like Ken Mile's tragic death actually may have save the life of Mario Andretti. Mario was behind the wheel of a GT40 MkIV with a roll cage fitted after the horrible Miles crash made them increase safety, at LeMans in '67, crashing badly but surviving.
Speaking of Mario Andretti, he spoke recently about his experience driving GT40s and said Ford added beryllium to the brake rotors to solve a cracking & disintegration problem. Interesting high tech solution in the 1960's.