1. The assembled Super Cobra Jet short-block demonstrates what makes an SCJ a standalone high-performance engine. Both the Cobra Jet and Super Cobra Jet use the same block, crank, and rods. Where they differ is camshaft, valvetrain, and induction. You can take a Cobra Jet and make it a Super Cobra Jet with a hot mechanical roller cam, stud-mounted adjustable rockers, and Holley induction.