I know besides the front and rear body panels technically all the LH cars are identical, with the one other exception of the rear doors (300M bow out to a point on the inside , while intrepid a bow in).
With that understanding, are the exterior trim mouldings that go around each door window all the same and interchangeable?
Obviously you know there are different finishes (satin black, chrome, etc.). But as far as fit, looking at the parts pdf's, fronts should be the same. There are multiple part numbers on the rears depending on badge - I'm thinking they are different on the Intrepid - but not 100% sure. The description on the rear ones for the Intrepid say "with ‘B‘ Pillar Weatherstrip" - the description on the other cars don't have that - not proof of anything, but strong evidence.
Hopefully someone who knows for sure on the rears will come along.
300M and Concorde are the same, as said above the Intrepid is odd man out, now, dont give up hope to have the chrome look,, some intrepids were stainless painted black, so , if you see one peeling black,, it just may be stainless, TFC did this