LOTS of good parts on that, and most will work way back down into the 1960's.
be careful with the wheels as the spare was 15x6 and has likely replaced one of the main wheels without being noticed.
I've never seen a 5th Ave with a thermoquad. Likely added.
Most all of the cruise control can be fitted on any Mopar.
"Police" style steering box
Electric trunk release.
Disk brakes
Sanden AC stuff
9.2:1 318 with 302 heads
Lockup 904/999
6 way power seat track
Bucket seat nuts and large captive washers that eliminate the need for inboard floor reinforcement plates
Dash lights and switches
Power window motors
8 1/4 that fits in an A body with only a perch move
ETC