The First 1967 383 A-Body, 'Barracuda or Mr. Norms's Dart'

Since I've become a recent owner of a GTS big block car I tend do go with what RhinoDart says in terms of statistics.

On the subject of engines I went back through my 67 and 68 shop manuals to compare engine stats between the two years.

The 67 A bodies had the standard 383 4 barrel engine installed. This is the same motor found in most of the full size Mopars of that year. The manual I have also shows in writing the standard 383 for 67 not the 383HP. That mean't a smaller carb, smaller exhaust valve (1.60") and cam specs of 256/260 exhaust and 425/435 intake.

In 68 the 383HP was designated and upgraded to the 906 casting which gave you 2.08/1.78 intake and exhaust, a larger 4 barrel carb, slight changes in the rotating assembly mainly piston deck/ height and cam specs of 268/284 exhaust and 4.50/4.58 on the intake. I'm not siure what the cam specs were for the RR 383.

As far as the restrictive driver side exhaust manifold, IMHO in looking at the subtle engine spec differances I don't think that was the major cause for the differance in HP rating. between the two years.

Hopefully I'll get a chance to flow test two HP manifolds to ge a comparison between an A body HP manifold and the standard HP manifold found on the full size Mopars.