340 dart or duster... what one is worth more???????????

Well, i was wondering cause i have my 72 duster 340 with numbers amtching, and all the stuff is original minus like carpet, headliner and paint. Now i just scored a 70 340 swinger, and it too is all original, but a rough one. Needing a full resto, and i was almost thinking that if i had to ever sell it, then i would never get my money back out of me doing all the work myself