I retro-fitted two remote servo units to my 1973 VW 1600 Type 2 during the winter of 1988/89, of which these are some pictures on The Samba forum
1968~79 VW Type 2, modified hydraulic circuit for remote-acting vacuum servos
25 mm square-section, tubular-steel, custom, home-made cradle, with 3 mm thick duralumin, brackets, supporting ATE Alfred Teves, remote-acting, hydraulic, vacuum-assisted, brake servo units (i.e. brake boosters in USA parlance), of the type which were factory-fitted, to right-hand drive, 1970s vintage BMW cars and possibly VW Golf GTI Mk. 1s.
This is fitted to my British specification, 1973 VW "1600" Type 2 Westfalia Continental campervan, which was NOT equipped with a factory-fitted, direct-acting brake servo, unlike the 1972 VW 17/18/2000 Type 2s, despite having front disc brakes.