440 info
Some other tim bits adam, these are low compression engines and probably with the good 452 (hardened valve seat) heads. If this block turns out to be a 76-78 block it will be one of the, what they called the thin wall castings. There is no problem with this other than Mopar does not recommend boring the cylinders past .030" of stock. This is right out of the Mopar book. Pre 76 the max overbore is .060".
Terry