I looking for a rebuild kit for a 42RH. I just got one out of the junkyard, a 94 I believe, to use behind my 318. I wanted to rebuild it before installing. The 318 will be rebuilt also, possibly to about 350hp. Is there a rebuild kit for the transmission anyone can recommend to get that will have all the parts I will need to handle the output of the 318? Also looking into a shift kit if it wasn't in the rebuild kit, nothing radical. It will be a cruiser, maybe 355 rear gear.

Also, are there any mods that could be performed to help the trans run better/stay cooler? I read somewhere a while ago that it was possible to add and extra set of clutches/steels for added strength by using thinner ones? Is this true/possible and whos clutches would be the ones to use?