I always recommend a hydrobooster if you already have a PS pump, as they work much better than a vacuum booster, and take up less room.

A vacuum booster would work if you like them, but they do suck (pun intended)

Would be best to use the original MC that came in the truck you borrow the axles from, as it will be the proper bore, which is much larger than the one in the kits sold for the 1/2 ton trucks.

I actually used a ford MC and booster, the bore is 1.625".
The hydroboosters are the same from brand to brand, only how the MC bolts on is different, the internal parts are the same, same manufacturer.

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-