It looks like both machines are first generation, so some parts will interchange. A 1972 wouldn't have many parts you could use on a first gen machine- they changed in late '71 (I think) over to the Borg/Warner transmission and most of the other pieces changed as well. The 297 looks like it's in pretty good shape, looks like a fun project. Good luck!
Stuck in the seventies- not in the swamp.
(6) Attex, a Hustler, a Super Swamp Fox, (2) Tricarts, (3) Tri-sports, a Sno-co trike, 3 Dunecycles, and a Starcraft! ...so far