Gosh I love E Body questions....
70 Challenger script used studs 71 and up were stick-on....Don't know about the new cars...
You use three of the steel clips/nuts for each corner piece and one on each end on the trunk trim. The white plastic fasteners are used for along the trunk lip.
There are three different thicknesses of window crank spacers that I'm aware of.
The thinest ones, maybe 1/8 go in the rear of a Challenger with "cone" shaped springs on the inside of the panel.
The next size thicker, maybe 1/4 do on the front of both Cuda and Challenger
The thickest, maybe 3/4 are for the rear of a Cuda without the springs inside.
The dam window cranks should point to 2 o'clock