Napaonline lists BK (Ballkamp) 335-3970 as the overhaul kit for the front diff. Carrier and pinion bearings with
Midwest Truck & Auto # R30RMK (Master kit with seals and shims but no crush sleeve)
(view but don't hot link this pic)
http://s7d9.scene7.com/is/image/GenuinePartsCompany/NWMDC?$Product=GenuinePartsCompany/690928
Pinion seal: NOS 15788
Axle seals
Left: NOS 13810
Right: NOS 12386 (Non-vacuum may be the same as the left)
The axle bearing listed is BRG BH2012 but that's for an 80/81.
If the shaft in the housing is too chewed to seal, BRG R1563 is the repair bearing with seal built in.