Ya, you guys are right on the compression ratio. I was using 84 cc to get 10:1. Don't know why I was getting 10.5:1 ????????????. Not knowing exactly what the cc's of the head are, I have to go with the owners memory on how much, if any was shaved off. I'm going to recommend pulling the heads and going with the steel shim gaskets. He's stuck with the Torker II for now. Personally, I didn't think that was a bad choice for an intake. Thanks for the info and recommendations.