Just out of interest. Here is the Dougs 440 headers in my Challenger.
The torsion bars are not in yet but by looking through the LCA pivot holes in the k-frame to the hex hole in the trans crossmember I have a clear line of sight along where the torsion bars will go and the headers are well clear.
The mini starter has so much clearence a stock starter should be OK. The kickdown linkage also has plenty of room.
I have manual steering but there is also plenty of room for a power steering box.
All pretty good for 2-inch primaries into 3.5-inch collectors.
The last time I used Hedman headers the collector flanges hit the torsion bars, the primaries hit the starter motor (both kinds), interfered with the power steering box I had, and the flanges were not level.
I will NEVER go back to cheap headers.