[427 pantera]

I had a 427 sb built.... builder used Yates c3 38cc heads. It's a street motor with a relatively mild cam (for good street manners). It's also fuel injected (terminator x). He was going to go over everything with me about the motor.... but shortly after finishing build, he passed away. Motor put 570 hp to the ground, so I'm not worried about the motor, just trying to find out more about the heads. This was my first Ford build and I was letting the real experts handle it. I wanted a reliable, 600hp motor with good street manners that would run on pump gas. Any Yates head "gurus" here that could give me a little education on those heads?