So I just recently purchased a 1963 Pontiac Grand Prix that I have been asking to buy for the last 20 years. Upon selling it to me my friends grandfather told me it was a 421 motor. I bought the car assuming it was actually the 389, considering it was the common model and the guy he got it from didn't know a thing about it and used it as a form of payment on some work that had transpired between the two of them. He then told me that a mechanic had actually confirmed this when he took it in to have it serviced after he took ownership of the car. After looking at some trim packages I'm starting to believe as well that it is, in fact, a 421. Then someone told me the wheels would tell me what I needed to know. I thought they all came with Pontiac's unique 8 bolt lug pattern, however, mine came with 5 lugs and the old dog dish style Pontiac hubcaps. A small search online seemed like it was suggesting that it may now possibly be a 421HO. I'm loosing my mind now. Is there an easy way to do a VIN# search to find out what I'm working with here? I'm ready to start the restoration but would like to know the model before I start investing because if it's a 389 it's getting some custom additions and if it's the 421 model it's getting an off frame stock restoration. Any help?
Originally Posted by W-Body Store
