1970 vs 1971 Dart bumper, which looks better?

Hey dan, is there a way to modify the 70 tail light assembly like you posted for the 71-73 lights?

Not easily. It would require custom colorless lenses and custom LED boards (which are not as simple as a lot of vendors make it out to be) or a lens-shaped plate and several of these or these (less expensive here but you have to page through a not-very-good website design to find 'em) mounted in a row with no outer rings, just the "inner" 55mm units mounted through the lens-shaped plate. Then we'd have to figure out where to put the red rear reflectors. Haven't measured; might be room for a red reflector + 3 of the round modules (stop/tail, reverse, turn).