John, you have a PM waiting. That reworked head has an original 261 casting number (913, maybe?) That's slightly lower compression than your 848, so we can either swap to that one, or pull the valves and get the 848 head resurfaced before reinstalling it.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!