The First 1967 383 A-Body, 'Barracuda or Mr. Norms's Dart'
I know for a fact that 67 barracudas and darts were both available with the 383 in 67. I have one of each and the documentation to prove it. The barracuda is a 4 speed conv formula s one of 9 and the dart is a 4 speed one of 229. To the best of my knowledge I'll try to answer the question of what mods were made to the big block a bodies from the factory. I have heard that sometimes the inner fenders may have been dinged hammered on occasion but other than that the only other mod was the hemi cars had flexible brake lines on the master cylinder for removal to get at the valve covers.
Carl