Boring the block .060" oversize and using Std. size 235 flat top pistons would probably compensate for the compression loss with the domed head. That makes the "216" a 224 cubic inch engine. It also replaces the cast iron pistons with aluminum- - - -less reciprocating weight, faster acceleration, and less stress on the Babbit rod bearings. Doing the same thing with the head for the flattop pistons will give even better performance.
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!