INCORRECT.
The 383 cars had dual round cut-outs for 1967 because the tail pipes had turn-downs. The classic Mopar rectangular dual exhaust tips did not come out until the 68 model year (340 & 383)
If the original poster wants to have dual exhaust cut-outs then the 68-69 style is the way to go but it would look best with rectangular tips. I have the AMD one for my 68.