So what you have is the GM Corporate 10-bolt axle (8-lug) with the 8.5" ring gear, which is similar to and shares some parts with some Dana 44's.
In any event, I do believe the inners are LM104910 (cup) and LM104949 (bearing cone) and are set #38.
The outers would appear to be LM501310 (cup) and LM501349 (cone) and are set #35.
You can get all these numbers by going to the website for Oreilly, Autozone, NAPA, whoever and looking up the parts for a 1985 K20 Burb. That is least likely to confuse you.
I suspect, though I'd have to check, that the bearing sets you mentioned earlier are for earlier Dana 44's with the other size spindle (there are two, one of which is shared with the 10-bolt.)
Hope that helps and is clear.
-- A