Hello Guys!

I have a pretty "old" OS .12 CV-R. I am planning on rebilding it, and was wondering if the .12CV-RX piston/sleeve would fit AND give me the performance of the .12CV-RX?

I understant that tolerances are a bit tighter, but was wondering if the sleeve would actually fit the engine block, and if the piston would work as supposed to with the wrist pin and the rod.

Anyway, just wondering if I could coax a bit of more power with this type of rebuild in my old workhorse, and not have to buy a new engine.

Thanks, as always, for your smart input!