Don’t be discouraged, if you have tried everything ells on your head then I would look at a hybrid head. There’s a car that that drag races out here that has Chevy SB2.2 heads welded together. The last few times I have seen it run it fast. With the NASCAR boys going to the new Chevy this year you can get those very cheap, and considering how they flow it’s a bargain. Doug Robinson built a head for his GMC 302 by welding some NASCAR Ford Yates D3 heads together. As Armond mentioned if built right I wouldn’t worry about reliability. I have a friend that has been running his Boss 302 hybrid head conversion Ford 300 since he got the head in the early seventies without any problems.
