Back in the day, all the factory high-performance Rat motors were sporting rectangular-port heads and the street/strip crowd followed suit. But that was then and this is now. The aftermarket has ...

In the first installment (April '04) of Sport Truck's 502-cid crate-motor buildup series, we gathered baseline dyno numbers on our test mule's big-block Chevy at Westech Performance Group in Mira Loma ...