So I talked to a former owner of one of these camper vans and he supplied the information. Just leaving it here as reference so others can find it if they ever need to! Thanks!
Engine Oil:
Type: 10W30 or 5W30
Capacities:
Dry fill: 4.8-5.3 L (4.5-5.6 US qt, 3.8-4.7 Imp. qt)
With oil filter change: 4.3-4.5 L (4.5-4.8 US qt, 3.8-4.0 Imp. qt)
Without oil filter change: 3.8 L (4.0 US qt, 3.0 Imp. qt)
Gear Oil:
Front/Middle: 80W-90 GL-5
Rear: Limited Slip 90
Capacities: Transfer case oil (1.2L), and front diff oil (1 - 1.2L), rear diff oil (1.2L) and trans oil (2.2L)