OK, after seeing the other thread with a similar question, I dug through my notes and looked up the answer. Here you go...

A63 consists of...
M31 - Body Belt Mouldings - top of 1/4s, doors, fenders, and hood
no-code - Front Stone Shield Moulding
no-code - Rear/Tail Panel Astrotone Moulding

A car with A63 will have A63 & M31 on the fender tag.

These pieces that made up the A63 molding group were all standard on a SE, and for that reason, A63 was not available on the SE cars. An SE car will have M31 on the fender tag, but Not A63.

A63 was a way to order these parts on a non-SE car.



M21 drip rail moldings will be coded on all the hardtop challengers.

M26 wheel lip moldings will be on the broadcast, but not on the fender tag on all the challengers except T/A and A66.

M05 door edge protectors & M25 rocker moldings were each available seperately from everything else.



M42 front stone shield molding & M44 hood rear and fender moldings are codes that were not used for Challengers. These codes are for Chargers and other cars.