You probably already know this but the engines in those wolverines share the same parts (top end wise) with a warrior, big bear 350, big bear 400, & kodiak 400. You can use a high compression piston kit for a warrior from JE Pistons (like I did on my Kodiak). Additionally webcams makes a few different grind cams for them as well. HMF has a bolt on silencer for them too ... Warn makes a 4-2-4 select (for about 300 bucks) so you can disengage the front driveshaft on they fly & play around in 2wd ..... just some food for thought. I really dig the old school 350 Wolverines.