Sorry, that was a 440 Challenger R/T! I went to see that with my mother in 1971. (I even got to see the nekkid bits.) I had my learners permit at the time, and my Mom let me drive home, and even do a small burn out in our slant-six Plymouth Duster!
That was my second choice of favorite car movies. Number ONE is still "Christine"!! It still gives me chills when I watch it.