I have converted a 60 series Chevy from vacuum booster to the Hydraboost style brakes . This worked out very well better brakes than the truck had new. The only problem was the master cylinder was for disc brakes and we had drum brakes , so I got some residual pressure valves from Summit and it works perfectly. I also converted my 57F600 to Hydraboost it also has great brakes. School busses are a great source of Hydraboost parts, most of the later ones have dual systems and are eaisly adaptable. Some of the mid size gas engine busses have a combination vacuum/ hydraulic boosters.


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