Not sure what to tell you on the various drum brakes. Not sure They are all interchangeable on a given axle housing because of flange location. Have to measure and see.
I'm sure you can't put dual hubs on a single wheel axle and expect any drum brakes to bolt on.

Do you need 3.42 gears, what will your engine be? I feel that 4.10 is about all a 235 or 228 can pull. 3.73 might be OK with more power, but 3.42 is pretty fast.

You can swap gears in the housings, it's not all that much trouble.
http://www.pirate4x4.com/tech/billavista/PR-ARB/articles/14b_Gear_Setup/

I'd pick which brakes you really want and use them now. I found rebuilding the old drum brakes is expensive.. good shoes are expensive, and drums not cheap either. don't spend time and money on something you don't really want or plan to use.

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-