modded husqvarna

I've been looking into changing my 450 Rancher 0.325" set-up to run 3/8" chains. This is the only saw I have running at this pitch, making my stacks of new chains collect dust (not sawdust). I have many new 3/8 bars already, I'm looking for suggestions on clutch and sprocket.

A 288xp lite fell into my lap a few months ago. Had low compression so Im doing a cheap reconditioning.. new piston, ring, pin and bearing. I honed out the damage on the cylinder and did some modest work to the ports.. main bearings seem ok, so I'm not doing the complete teardown. I should add...