This has a locked up 216. I would not be surprised with he valve cover off that water has gotten in and broken the block.I will know once I get back to the farm and see what is what. I know you can pick up a 216 very cheap as nobody really wants to fool with them and most prefer the 235 and above.
I know what an undertaking my 39 Chevy car is but it is a hot rod so a bit different in many ways than this truck. It may be more than I want to bite off but I hated seeing it go to the crusher.
Hope to make a trip over in a couple of weeks and try and get it home.