closed chamber and open chamber are the main differences, domed pistons would contact a closed chamber head and an open chamber head would have lower compression with flat top pistons
there was thought years ago about taking .1"?? off an open chamber head to help the compression with flat pistons
Jim C had pics that were just linked to in a thread in the 40 tech section showing different heads side by side, not sure I can find it tonight.
there was thought years ago about taking .1"?? off an open chamber head to help the compression with flat pistons
Jim C had pics that were just linked to in a thread in the 40 tech section showing different heads side by side, not sure I can find it tonight.