D70U axle seal replacement - cant find part number

Can someone steer me in the right direction on outer axle seal part number for the D70U on my 95 2500, I've had no luck finding part descriptions that appear to be accurate on the generic parts-store websites (rockauto included).

your probably best off just pulling it and taking down to the store and matching it up, the U rear ends are hard to get the right parts for because they use some different parts, like when i rebuilt mine i got a bearing and shim kit from 4 wheel parts and the pinion bearing was wrong because our U's use a smaller bearing than every other d70 out there, i even called them and gave them all the info off the axle and i still got the wrong parts

I was afraid of that, looks like the fun train will remain at the station for maintenance

Here you go Federal-Mogul Resource Center - Vehicle Look-up

Should be P/N 710067 National seal.

Napa actually only lists one for our truck and it ended up being right! The 2 9/16 socket needed to get the hub nut off ended up being the second trip to napa. The socket was about 25 bucks.