I actually have the 10-7.25" pattern (5 front 10 rear)....
...I noticed that it is indeed a 2-piece hub and thought that if I can change the outer hub to 8-6.5, I can easily get an adapter from 8-6.5 to 10-11.25...
Unless we're talking about different things it's a single piece hub, and the rotor bolts to it. there is no "outer hub" there is only a hub; one piece.
If you want 8 lug hub you need the caliper brackets off of an 8 lug version of that axle and then you can go to NAPA and buy a set of front hub/rotors (all one casting). (Oops, you might not have a NAPA where you are) You can reuse your spindles, caliper and steering linkage.
Basically sounds like you want the 8 lug axle and not the 10, those are the minimum parts you can change to get there.
Is this a good idea though? If you're overloading the rear are you really overloading the rest of the truck too, at what point do you need all bigger components?
Swapping to 8 lug front axle parts is a decrease in capacity, you get smaller disc brakes than you have with the 5/10 version.
This picture is a 5/10 lug and the 8 lug P30 axle side by side.
https://picasaweb.google.com/118082...pgradeForOldGMTrucks#5823745242769935698Grigg
