Are wheel bearings all the same for half ton?

[bennylava]

Are wheel bearings all the same size for the 80's half ton trucks? The parts places say to use Timken part numbers set3, and set6 (inner and outer) for my 87 half ton 2wd. Just wanted to check and make sure there was no chance of a different wheel bearing, for some reason.

I had heard something about heavy duty brakes... can't remember. Thought it best to ask.

Thanks!