don't polish the 30, but I'd say your 8.25 will be fine.
Stuff a 44 in the front but unless you are really hard on the go pedal you don't need a 60 rear for 35s.
I wouldn't buy those axles because:
1. front one is drums. They suck, you're going to have to swap knuckles and other stuff to make it decent and I am not sure if that's a closed or open knuckle axle. If it's closed, you're stuck with the drums iirc. Hopefully someone who actually knows something about older IH 44s will pop in.
2. rear one might be one of the old wimpy ones like the J20 rear dana 60
Check into it, there isn't much info in that listing. You can do better pricewise hunting the junkyards yourself, and shipping is going to be a killer on that, at least a few hundred bucks.