For an 85 PU they will be the same as a 60 series or other big knuckle cruiser.
Cone washers: 42323-60020
Nuts: 94115-71200
Washers: 90201-12019 (plate washers)
studs: 90126-12005
from onur at ABQ Toyota.
FWIW - ARP studs have very mixed reviews and many of the aftermarket suppliers like Marlin and TG have Toyota "type" studs. Your call on if they are Toyota quality. I'm not always a believer that Toy parts are worth the money, but I haven't seen any studs that combine strength and the right amount of stretch that the Toy studs do.