Dual Master Power Brake Conversion

[tomfg]

I have a 64 C-10, with the original round single master brake cylinder,
and original "Drum / Drum" brake set-up. The truck has a 1978 350 Chevy engine.
I'd like to keep the "drum / drum" brakes, but add a dual reservoir with power booster.

I'm trying to find something in "black and white" telling me what parts would work for my setup, but I'm getting soooo lost in all the forums. Most are talking about disc / drum setups, etc.

Is there a good write-up on the net for drum / drum coversions?
Or can someone tell me what year vehicle parts would bolt in,
if I'd need any aftermarket brackets, and maybe how to best
split the brake lines.

I'd like to go to Autozone, or the likes, and buy stock parts,
and not an expensive conversion kit.

Thanks for any help!
Tom