Last month we told you about the certification of the TFS iron heads for small-block Fords through J. Bittie American. We have the same great news this month except it's directed toward Chevy fans.

I needed to call AFR boss Rick Sperling to give him the great results I had just seen with a pair of his company's small-block Chevy heads on a 350. In a way, I was just bragging, because our ...