My self I would pull all the tin, covers, and the head off. Then take the head and block with the crank and pistons to a shop and ask them how much to build the short block / long block. Then you get a warranty and all the parts will be correct. It never hurts to ask. If there a decent place they will be clean and will let you look around and ask questions. If they hide in the back or give you the old insurance does not cover customers in the back bs then go to the next place. They should have nothing to hide.
You might want to look into the link section. You might be able to get a used engine and trans shipped to you for half the price.