I think I'd talk to Richard at West Coast Cylinder Heads. He builds engines on the side and does good work from what I hear. Most of the mass produced hot rod engines have issues in one form or another. I had three built by HKE in Houston and all were junk. Others have had good luck with him afterwards but not another dime of my money will go there nor will I ever recommend them to someone. I finally took mine to a local person for the machine work and balancing and then assembled it myself. Doing the file fit rings was the most time consuming part of the whole assembly process.