I think the afr is a 115 or 116 ill post up a link when I get to a computer. And sticking a 454 crank in there would be a 427? I didn't think I could make it that much. I've been told a 418 is pushing it. The previous owner already bored it .30 over but I'm not sure of the bottom end what it consists of. Im in no rush to build it so I want the best and do it right the first time