The Bendix booster on my 2 ton is a 374000, the steel vacuum cylinder is about 7 inches O.D. and roughly 5 inches long, pretty sure it is the stock HydroVac since the mounting bracket and all of the plumbing lines fit in the factory holes.
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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