can i put the head from a 1991 CRX Si on my 1995 civic Cx. with out changing the pistons. do i need to change the intake, what do i have to do to make this work.

 

what about the throttle body? the one from the Cx intake is to small and the map sensor is bolted to the top of it. I do have the si throttle body but what do i do about the map sensor? Should i find a different throttle body off of a 92-95 Dx or Si?