Sounds like sales are going very good. I think I'll wait to see what the consensus is after you guys have run them. The other problem I see at this time is I was planning on putting them on a 360 Magnum and there not setup for them yet. Hopefully down the road that changes. Also I don't race so at this point don't need all out power. A few years ago I had a 70 Dart 340 and I had a real good supply of parts, including Mopar Performance heads and everything else to keep a 340 Happy. Sold the car and got rid of all small block parts. I bought a 74 Duster and now looking to build up a collection of parts for my 360 magnum that I will eventually install.