383 Exhaust Manifiolds vs. Headers

Some Mopar-magazine did an extensive test between various manifolds, shorties and headers.
They even tested the HP manifolds. Didn't do much for performance.
I recall the outcome was something like this;

Type: --- Manifolds --------------- Shorty headers ------------- Full length headers
HP: - - - - sucky ------------------- less sucky --------------------- good
Fitment: -- good -------------------- less good ---------------------- mostly suck

:)