I have an OFNA Force .32, I put a different clutch on it it fits fine except the crank is a little short a couple millimeters. Can I use the OFNA clutch bell shim kit the one in at horizon hobby part number OFN10099 sorry for not posting the link can't do that yet.
Thank you

Yes, that should work for you.

shimming is to help if you have to much crank space and clutch bell. Shimming won't give u a longer crank, u need the correct mounting collet, flywheel, lock nut, and bell.

Didn't shimming reduce compression ratio to avoid piston rod bending/cracking while using high nitro fuels?

Yes, when you shim the head button on the engine..but shims can be used anywhere you need to reduce free-play( diffs, clutch, steering system etc )