74 Valiant Brougham
On the front end- Fenders, hood, grill, bumper, ect. any 73-76 duster, valliant, scamp will inerchange.
Dash and dash parts- any 70?-76
Rear seat- 4 door only (I found out the hard way that a 4 door rear seat will NOT work in a 2 door)
Doors- 4 door dart or a valliant.
Suspension- any A-body 73-76
Front seat- Not sure but I think that any 2 or 4 door seat will work.
Door pannels and the rest of the interior trim- Any 4 door A-body 73-76
Slant six- If your going to do a swap for another slant try to get the latest one you can. I think it was 1978 that they got rid of the sparkplug tube heads.
V8- Hemi
That is just off the top of my head anyone please correct me if Im wrong.