358 Small Block Cylinder Head & Rocker Arm Upgrade - A Different World

We tear the heads out of a 1970 Chevy Chevelle and replace them with World Products Motown 235CC cylinder heads and Scorpion 1.6 rocker arms for more horsepower and torque.Gaining more power from a proven combination can be tricky. It's easy to do too much, forgetting that "bigger is better" isn't always true.In this case, we were looking to extract more power-and faster e.t.'s-from the 11:1, 358ci solid flat-tappet small-block in Matt Daeseleer's '70 Chevelle. The car had a best run of 12.68 at 110 mph going into the project, so it was no slouch, and we certainly didn't want to mess up a good thing. Fortunately for all involved, we didn't. Moving more air through this motor with a set of big, 235cc runner Motown 23-degree cylinder heads, teamed with a bump in cam specs via a set of Scorpion 1.6:1 rocker arms, proved to be exactly a formula our test subject liked-especially at the track.


Photo Gallery: 358 Small Block Cylinder Head & Rocker Arm Upgrade - Chevy High Performance Magazine

Photo Gallery: 358 Small Block Cylinder Head & Rocker Arm Upgrade - Chevy High Performance Magazine


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