'79 K20 Steering Box Rebuild Issues

[zac]

1979 K20 Camper Special, 400 sb, TH400, NP203, 14FF, 10 bolt front. Ordered the correct kit off Rockauto for box 7802644, which is on my truck. Apparently they also installed a 7802644L that year as well. The bearing, seal and dust seal that came in the kit for the stub shaft are much too small. The stub shaft where the bearing rides on my box is 7/8". Sometimes with the Camper Special things get a little crossed up when finding parts, so I checked out what the kit for a K30 would be. Same part number. I'm afraid if I send the kit back they will just send me the same kit again. And I will probably get the wrong one from Autozone etc as well. Just wondering if anybody else has run into this and can save me some time and aggravation.