My experience with the Cobra jet and Super Cobra Jet designation in the Ford FE engine family, because the naming convention confuses people and causes buying mistakes.

Cobra Jet: the 428 cubic inch engine with hydraulic lifters, a cast iron intake, and a factory-rated 335 horsepower. Available in the 1968-1970 Mustang and other Ford vehicles. Reliable, torquey, and strong for a street car.

Super Cobra Jet: the 428 with a heavier-duty rotating assembly, the drag pack option, an oil cooler, and a mechanical lifter camshaft. Available only with the Drag Pack option, which also included a Traction-Lok or Detroit Locker rear axle. Factory-rated the same 335 horsepower but with meaningfully more capability.

A car claiming Super Cobra Jet status should have the Drag Pack code on the data plate and the correct date-coded components. The designation matters for both originality and value.