The nice thing was that you didn't see air pumps on muscle mopars like you did on the Chevies. Chevy ran a different deal and had to have that air injection in the exhaust to get past emissions stuff. Different approach to meet the regs. Neither would have done what they did without them "rules". :)
Mopar had a good package. Funny that they ran with the other stuff with much bigger camshafts, carbs, etc.