Watch as we compare popular oval-port big-block Chevy cylinder heads on the flow bench and the dyno. Click here for more details or check out the June issue of Super Chevy Magazine ...

I have a 1971 Chevelle SS that I bought new. It is a 402 big-block, four-speed car with 3.31:1 gears and is stock. I want to freshen the engine up by increasing the compression ratio from 8.5:1 to ...

The four-bolt short-block's main players are a Scat/JE forged rotating assembly and a Comp Cams Xtreme Energy XR294HR hydraulic roller cam. The XR294HR offered a 0.540/0.560 lift split, a 242/248 ...