Ok so a rod knock? Piston rings? rod through the block?
Sorry to keep asking but I may.........or may not be interested?
PM me for more details.
Rod knock to my understanding, I never heard the engine run to hear the issue at hand. The engine is out and disassembled for the new owner to take a peek at things and go from there. Head etc is fine. Slap a bottom end in it and go.