looks to me if you used the bumper on the right on a vehicle that originally had the left style bumper that the ashtray would not close flush, so there may be a difference in the trays themselves or the dash frame tray opening?
You would think. Are all the dash frames the same from 71-74? They are all listed oinline as being the same. I think I nailed these bumpers to 71-72 and 73-74. Looks like they'll fit in the same hole (.187") but the head ARE slightly different. Maybe because of the larger surface area of the later ones, they didn't "squash" as much over time. Just enough. Thus the ash tray door stayed flush.
This has been an INCREDIBLE learning curve. The Mopar parts books are TERRIBLE compared to every other maufacturer. The Cheby (and even AMC) parts books you could use as a restoration manual. The Chrysler books have errors, ommisions and some items dont even HAVE part numbers (like E body ash tray bumpers!?!?!) And the drawings are cartoonish like a drunk drew them with a crayon created them. I worked at Stanley Garage door openers in my 20's. I knew some of the ARTISTS that creaed thier literature and it was spectacular. And that was for a GARAGE DOOR OPENER.