In line with the question of what block is this? - I have a block that I was told is a late 64 427 top oiler. The only casting number that I can find on the block is C4AF. I don't see that number in Crist's book. Does anyone have a better source and can tell me what it is. I am beginning to fear that I was taken and that it is a 390 block. Any help would be appreciated.
