Headers for a A body

"From what experience that I have had with putting headers on a car it seems that mopars are the most difficult because of their small engine bays and steering linkage."

Not by a long shot, the 65ish mustang/fords with their linkage style power steering, or 429 big block ferds.
Mopars are a picnic compared to some .
I had a 428 cj in a 69 Ranchero (factory). I couldn't get a hand between the exhaust manifold and the shock tower. I sold it before I had to put plugs in it.