The 1970 Pontiac GTO Judge Ram Air IV is the car that ended up defining what the muscle car era meant at its absolute peak. The Judge package was available with the standard 400 or the Ram Air III, but the Ram Air IV is the configuration that matters.

The Ram Air IV heads — round exhaust ports, large intake ports, aggressive valve timing — flow more air than any other Pontiac production cylinder head. The camshaft profile was the most aggressive offered in a street car from any GM division in 1970.

Finding a documented Ram Air IV Judge is difficult and expensive. The correct documentation includes the broadcast sheet, the PHS certificate, and date-coded major components. Without that trail, you're buying a story.