5L v6 out of a 1963 GMC c30. It is locked up and has some pretty ugly pits in one of the cylinders. Not sure how long it has been sitting. It came with the pickup when I bought it. Not sure if its save able or not. I dont have any experience in boring out motors or sleeves so Im not sure if thats an option. Tore it down part of the way just to see what was up with it.