Just an FYI on latch trays. I saw some posts asking about this and I found out the hard way today.
YES, they are year-specific and model-specific in most cases.
I don't know for sure about 70-71 Cuda, but...
70 and 72-4 Challenger are different from each other.
72-74 Cuda are different than 72-74 Challenger.
I had a nice 70 tray with a 73 support painted and bolted to my car before I noticed a difference. D'oh!
Amazing how much you DON'T know after almost 30 years of doing this.