I don't see the Cavalier reference but I really don't deal with too many Chevrolets.
Fits the car fine but it's not going to work with my 440.
It was obviously designed for a small block. Its a shame, it really does set up in the car nicely.
To bad I wont be able to use it on my setup. The 65 has a 426 Hemi and the dart sports a 440.