Rats! They seem to be everywhere, infesting the streets with their special brand of colossal big-block horsepower and torque. Yet despite all their power and evil reputation, there's always been one ...

It's obvious that hot rod parts have evolved tremendously over the past 70 years or so. One of the best examples is the small-block Chevy cylinder head. A scant 30 years ago, the iron "fuelie" casting ...