After rebuilding and installing a 350 in my Nomad....after a few mile it started a slight knock and oil pressure fell. No overheating or bad stuff in the filter. The motor has Isky alum heads and Isky cam. Tri power, MSD, all new everything on a single piece rear seal, four bolt .030 over motor. Serpentine set up etc. I said screw it and bought a new motor and will sell this one, either as is or fixed. Its NICE but I needed to get on the road this Summer. Give me a good offer.