For window spacers, there are 3 thicknesses:
For the doors, the same spacers are used for 'Cuda & Challenger, but IIRC they are the thinnest ones. I would go with Alan's comments as he's reassembled a car more recently than me.
For the rears, 'Cudas used the thickest spacers. I have pulled apart several '70 'Cudas that had springs in behind the panel as well.
On '71 R/Ts - the Challenger script emblem goes in 3 places: tailpanel, and one on each fender.
If the car has R/T side stripes, then the emblems go below the character line on the fender.
If the car doesn't have R/T side stripes, then there are several examples of cars that came with a script emblem and R/T emblem below that on the fenders.
For the hood: R/T decal for the dual scoop hood, Dodge triangle 'Fratzog' for the shaker. No DODGE lettering on either, no R/T decal on the front of the shaker.
For the decklid: DODGE emblem similar to the one on the grille, but adhesive backed, at the right rear of the decklid. 1971-only emblem and placement -- all other years used Challenger script (plus an R/T emblem in '70 only)
There is at least one other GK6 V-code in existence - JS23V1B416xxx. Black interior, 4-speed, super track pack, shaker hood and not much else. Have lost track of the whereabouts of it. Last known to be in IL or MO