68/70Vette
Well-known member
I installed a Hydraboost in my 70 to replace the stock GM power brake system. When I went to mate the Hydraboost clevis to the brake pedal, I had to move the brake pedal forward to match up the hole in the brake pedal and the hole in the clevis. With the holes matched up, I inserted the retainer pin. Problem: The brake pedal is now moved sufficiently far forward, that the brake light switch no longer "works;" i.e. the light switch plunger no longer touches the tab on the associated brake pedal bracket that opens the switch when the brake pedal is not depressed.
The brake pedal has two holes; the one on top is for the input shaft clevis for the manual brake master cylinder and the one on the bottom is for the input shaft clevis for the power brake master cylinder. (Top means the hole closest to the brake/clutch pedal shafts).
Is the Hydraboost meant to be installed in the hole for the manual brake system? If it is, the shaft going to the Hydraboost will be angled slightly i..e. the upper hole doesn't really line up properly with the Hydraboost.
If I wanted to use the second hole (the stock power brake hole), I'd have to have the aluminum spacer between the Hydraboost body and the firewall milled down. The spacer plate is about 3/4 of an inch and is located on the engine side of the firewall.
I tried calling Hydraboost and they no longer provide technical advice by phone. I called VBP, who I bought the booster from, and they didn't know,
Anyone with experience with this unit???Thanks
The brake pedal has two holes; the one on top is for the input shaft clevis for the manual brake master cylinder and the one on the bottom is for the input shaft clevis for the power brake master cylinder. (Top means the hole closest to the brake/clutch pedal shafts).
Is the Hydraboost meant to be installed in the hole for the manual brake system? If it is, the shaft going to the Hydraboost will be angled slightly i..e. the upper hole doesn't really line up properly with the Hydraboost.
If I wanted to use the second hole (the stock power brake hole), I'd have to have the aluminum spacer between the Hydraboost body and the firewall milled down. The spacer plate is about 3/4 of an inch and is located on the engine side of the firewall.
I tried calling Hydraboost and they no longer provide technical advice by phone. I called VBP, who I bought the booster from, and they didn't know,
Anyone with experience with this unit???Thanks