This is an interesting thread. I have both a 1939 and a 40 216 with domed pistons. I would like to bore one of those engines to use aluminum 235 pistons. Can one swap a later ('41 and later) head that would work well with the flat top piston? I imagine finding an aluminum 216 or 235 piston would be almost impossible,
Thank you Jerry for your information on the earlier 216 engines.
Harmon
