Originally Posted by Peahi
Wait a minute man, what car is it then? Please enlighten us. I'm totally curious whatever car it is. If it's a modded mustang more power to the mustang!
Indeed it is the modded Mustang. Famous hot rodder Max Balchowsky modified the cars for the filming, and the 'stang had milled heads, headers and a few other tweeks.
McQueen wanted the movie to be the first to be 'live sound' recorded.
However, during editing it was clear some of the sounds hadn't come out as well as hoped, so some sequences needed to be over dubbed, and in an interview in the late 1980's, Bud Ekins told how he had to then take the Mustang up to Willow Springs and remembered blowing the rear end up on it while winding up through the gears repetitively to record the engine sounds to be used on the bits of overdub.