Need help with names of two car movies. I only remember a very little bit of each.

1st: The movie featured a 55 Chevy which was hidden under a football field. I also remeber it going through a car wash and the paint washing off to another color.

2nd: I only caught the end of this one which had I believe a mustang at the very end catching fire and burning to the ground after a race.

I know this isnt much to go on, but any help would be great!!