Okay...Here's the problem....
You've made the car to look like a Cuda, with the stripes, and hood etc..., but the reason it looks plain or "too much red" is because it's missing all the standard Cuda trim.
ALL 1970-1974 Cudas (non Hemi) CAME STANDARD with wheel lip moldings, rocker moldings, belt moldings and tail panel moldings NO EXCEPTIONS...These were NOT extra cost options on a Cuda, they were part of the CUDA package. PERIORD.
The problem with most people who try to "clone" a Cuda often make the mistake of not including all this trim on their cars and it results in a very poor clone. I'm not saying this is the case here...
You are building the car to your liking not trying to clone something I understand.
With that being said...I think 70 fish scale rocker moldings and wheel lip moldings at the very least...
Another vote here for marker lights too...