Cranckcase, it was simply not startable and from a fiscal point of view it was much smarter to just replace it with a brand new engine because costwise getting the old one to start again would have been pretty $$..Anyways, I think it had a cracked block. Plus, the crate engine going in it is a 350 but it puts out close to 350 HP whereas the OEM 350 in there only put out 205, and that is a conservative estimate.