Thick blocks in a 250. I was just talking to a guy atoday about that.. He said that some of the earlier 250s--mid 60s??-- had thicker walls.. You can tell them by removing the water pump and if the inner wall of #1 cylinder has been machined flat to clear the pump impeller, the length of the pump, then it is a thick walled one..
Just what I was told. Sounds reasonable...
PA
