I didnt see any number by the distributer? But either way its not a pontiac 400?
Don't feel too bad, I've been searching for this mystical number for a while as well....
My block is an XS and I was told it was out of a GTO Ram Air.... but I just found a number, below distributor on a horizontal surface and obscured by the transmission dipstick, the partial I can see is x300667 which I havent found in the listings.... other than that there is a "2" a few inches to the left.
