Some might call this a mulligan—you know, the term coined in golf where you screw up a shot so badly that your buddies take pity and pretend it never happened. And given the outright hate we felt ...

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 ...