If you keep it stock and drive slow, (you don't have a choice with the original gears), then an original master cylinder will be fine.

If you want a little safer system, then a dual circuit master cylinder and bracket kit available from the usual places would be a good idea.

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-