1967 383 'Commando' vs 'Super Commando'
Teak,
NHRA calculated the 1967 383/280 HP in an A-Body with 'stock exhaust' and de-jetted
Carter AFB (575 CFM) - to a correct 255 Horsepower at 4200 RPM's.
The same 383 in the B-Body, with the better flowing exhaust manifolds and
'intermediate' exhaust pipe system was calculated to come in at 270 HP at 4600 RPM's.
1967 383 B-Body, Right Side Exhaust Manifold #2532464
1967 383 A-Body, Right Side Exhaust Manifold #2863900
1967 383 B-Body, Left {Driver} Side Exhaust Manifold #2532626
1967 383 A-Body, Left {Driver} Side Exhaust Manifold #2899002