76 Dart Tail panel swap?

Lee Robinson said

The 70-73 and the 74-76 rear body panels will fit 70-76 Dart and 74-76 Valiant 1/4 panels since the later
model Valiants are based on Dart body. The 1/4 panel extensions are different between cars with tail lights in body and ones with tail lights in bumper. The 74 -76 cars also use the big impact absorbing bumper shocks. Rear trunk floor
should be the same.

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Not true. Having done this swap, I can tell you the 70-73 quarter panels are different than the 74-76. Marker light holes in the wrong location, quarter panel for the 74-76 are a full 1.5 inches shorter than the 70-73. The angle of the rear of the quarter where it attaches to the tail panel is also different. The rear trunk floor on a 74-76 dart must be extended approximately 1.50- 1.75 inches behind the spare tire well to the rear tail panel. There's pictures in my build thread.