the 88 crx si had the weakest clutches of the ef crx sis...the 89 was a little better and the 90-91 had the beefiest stock units

so i'd consider a used 90-91 crx si flywheel, a stage 2 clutch and pp ~$300 for all parts and do the mini me swap since you can get a head & ecu both for what's left over