If i am mistaken i will be the first to admit it all i know about this car is that it was originally owned by a man in town here and my friend purchased it from him it looked like it had never been apart had an invoice in the glove box with the warranty info.it has a 400 pontiac and a th350 underneath..but i cant recall if it said on the invoice or rpo tag off the top of my head w72 for the the 400 pontiac engine.if im wrong than maybe the engine was swapped in at the dealership because this car is as the orignial owner stated "exactly how it was when he bought it"only slightly older but like a said if I'm wrong im wrong.I am not afraid to admit it and it wont be the last time.I'm only 25 and i have a ways to go before i'm perfect.