68 Cuda 383 vs a 360

DionR, the 400 replaced the 383, as a factory built engine the 400 wasn't an upgrade. (Except for the future stroker engine combos)
Also the 72-73 340s weren't as good as the early 340s, so just because the 360 replaced it didn't make it an upgrade, remember chrysler was leaving performance in the early 70s.
The early 360 was a great engine but wouldn't keep up to say a 68 340