Also, just an update, tried to paint the body panels myself... Not so well, and the clear I had ended up curing with extremely bad orange peel.
Yep, its a cammed LS7. Dyno'ed at like 680 I'm told. Sucks about the peel. If thats all it is maybe you can sand it flat and clear it again, if it won't sand and buff up.
All Grand Prix, all the time. 69 Model J, 99 GT & GTP coupes. All junk, haha.