Front inner axle shafts are the same as the '77 in your sig line and make great spares. Same with the rear axle shafts. The diffs fit your '77 after you swap the driveshaft flanges. Tierod also swaps but not the drag link. The wheel cylinders can be cleaned up and used for spares too. Drums match the rear of the '77... Occasionally someone wants the OEM wheels... Yep, there is some value there over just junking them for scrap prices.
Sorry, I was out of town for a softball tournament, just got home. I'll take some pics later and post them, it might not be until tomorrow though, i got hit by a line drive right in the knee cap, not walking too well right now (i'm a pitcher).