Just FYI-
A- I've never seen a factory interior like the one posted above, so I'm betting "most people" don't associate that with a Mopar "contrasting" interior.
B- the only factory red interior available for 73 was a plaid pattern seat cover set that can be quite polarizing.
I'm not sure if they even offered a red headliner, so that might be difficult to find.
C- they do make Demon "Halloween" bucket seat covers, originally offered only in black with orange inserts, but now available in black with red inserts. IMO, those are WAY cool.
IMO a red headliner and carpet might look odd.
I two-toned my 73 interior by using white SSP upper door panels and seat covers and keeping the the factory F6 green carpet, headliner, lower door panels, dash, etc. I get a fair amount of compliments, and IMO it looks like something the factory could have come up with.
Most "factory two-tone" interiors other than the Demon mentioned above and the somewhat "standard" "XW" black dash and carpet with white seats were in the 67-68 years and had colored dash and carpet with white seats. There was a "tri-tone" option that had a third color upper door panel paint.