Traditionally they are vacuum boosters bolted to a master cylinder, like most newer cars and pickups have.

Alternatively you can use a hydrobooster as found on most if not all current diesel pickups. If you will have power steering this is my preferred choice by far. A hydrobooster uses PS pump pressure to help instead of vacuum, it is attached to the MC in a similar fashion as a vacuum booster.

An older solution is the hydrovac like you have, and some slightly newer versions of the same thing could be substituted.

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-