They would have to have a closer dimension from the wrist pin to the top of the piston, or a recess cast into the top. As long as the piston comes to the top of the block and the head gasket thickness is the same, the only way to lower compression pressure would be with a dish-top piston.
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!