So I'm looking at getting a 69 coronet 4 door parts car. It seems very complete trim wise and interior. My question is how many parts are interchangeable? Or maybe an easier question what's not interchangeable. I'm assuming grill fenders and windshield trim things like that would be identical. What about the rest of the trim/ moldings? Interior? Sorry for such a broad question just trying to make a decision before it's gone. Thanks for the help in advance!