I have a 67 326 that I had rebuilt. I went 30 over and had the heads ported a bit and went with an R V cam. If you like I can get you more info on specs,etc. The heads and block were decked. I went with forged pistons and a 4 brl. I was told this is a good combo. My car is #'s matching and I wanted to keep it that way. Long live the 326.