Actually, of the two (I think) '68 Mustangs used in Bullitt, I don't believe McQueen ever owned either. One was destroyed in filming during the chase and the other, a camera-car, is owned by some recluse in Kentucky, I believe. He hasn't let it be...
The Mustang in the movie BULLET, was it owned by Steve McQueen. I think out of the top ten car movies is Bullet, althrough I've seen AMERICAN GRAFFITI 27 times, I do like BULLET>