I looked at the ad for the short block on Ebay. I would call them and ask them if after tearing it down and the crank or rods are not usable if it can be returned. How much time for warranty? It says sold in as is condition. How much more for freight shipping? Don't you have any recyclers local that will give you a better deal? I would prefer a 70-80s Gen IV model with the last three digits of head casting # 781s or 049.