You cant clean up the cylinder and just throw a AM one in their? I did that to one I picked up and i believe I put a Farmertec in it and she runs like a bat out of hell!!! There was a little scoring but I ran it and she os still running and pulling like a MONSTER. I heard some AM pistons have problems with the skirts hitting the crank. I didnt and still dont with the Farmertec. Let me know if you need the PN or IPL or manual. New P&C is $189 about and the best to deal with is @spike60