While definitely not a Mopar thought I would share some more headers. Vettes old small, pump gas street car headers to it's current racey ones This is a stock front end car, stock steering, control arms and frame rails.
Street car days
Current headers
Ovaled tube in the second pic is interesting. You ever talk to someone at one of the big race shops about the effects of doing that? Maintaining the area as opposed to just beating a dent in it seems a better solution. Just wonder if it hurts it. Sometimes you just have to make it fit.
If the results don't match the theory, change the theory.