The spindles are the same enough to swap without any issues at all, only difference I know of is grease fitting location.
The brakes on the 8 lug ARE SMALLER than those on the 10 lug.

No way to keep the large rotor and use 8 lugs that I'm aware of and I've done a lot of research and parts book scouring trying to fit different hubs/rotors on these spindles.

West cost is way to far to go after an axle I don't really need...

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-