The low compression head can be milled .090" to make it have the equivalent compression ratio as an 848 head, but some other modifications must be made such as recessing the intake valves the same distance to prevent valve to piston contact. It's also necessary to make some modifications to correct the rocker arm geometry.
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!