The Stovebolt Site Forums The Shop Area Driveline Aftermarket brake booster

Hello,
I purchased a disc brake kit that came with a brake booster assembly (1950 Chevy 1/2 ton). My truck is gutted and does not have the original brake pedal or assembly. I'm staring at this booster that came with this kit and trying to figure out what type of pedal/linkage I need to get. By looking at the booster (picture attached) does anyone know what type of pedal I need to get? Do you think this works with the original pedal that would have been on my truck? The kit did not come with any instructions. I will contact the company to see if they can help but thought I would see if anyone here has already done this. I'm not even sure where this booster mounts. I'm thinking I will need to drill holes in the frame to mount it? It doesn't seem to coincide with the original holes in the frame. Kind of confused. Jason

That looks like it would mount under the floor in place of where the original master cylinder mounts but that's just a guess as I've not messed with one. Getting hold of the supplier is a good idea.

Ok, I think I figured it out. The bracket on that booster is designed to work with stock brake pedal. Since I don't have a stock pedal I should just be able to unbolt and discard that bracket and use the booster with an aftermarket pedal. I'm pretty sure speedway has a pedal and bracket that will work.

Are you planning to mount the master cylinder on the frame or the firewall? A firewall mount is going to need some bracing to prevent the firewall from flexing when you step on the brake. If you're planning to use a swing pedal, the pedal bracket will also have to be mounted on a reinforced pivot. If those things aren't addressed during the buildup, the first panic stop will be interesting, and not in a good way.
Jerry

On the frame. The assembly gets good reviews. I didn’t know you could mount it on the firewall. What are the advantages of firewall mounting?

You can use more modern type swinging pedals that don't go through the floorboard, which frees up room under the floor for the exhaust system, automatic transmission bellhousing, etc. Finding a pedal assembly from an aftermarket supplier that works with a frame mounted master cylinder has two possibilities- - - -slim and none. Either find the original pedal assembly or count on reworking the whole pedal setup for swing pedals. Are you going to run a stick shift or an automatic transmission?
Jerry

Here it is: https://www.speedwaymotors.com/1947-1954-1-2-Ton-Chevy-GMC-Pickup-Power-Brake-Pedal-Assembly,8903.html

I’m using a 1960 Jetaway. Thank you. I’m hoping you’re wrong.

Last time Jerry was wrong was during the Eisenhower administration.

Hmmmm- - - -it looks like I might have to backpedal a little on this one- - - -that link does show what looks like a floor-mounted pedal that will work, but only with an automatic trans application. What kind of engine is ahead of that "Jetaway"? Those were extremely rare transmissions and were only used for a couple of years back in the early 1960's, unless you're talking about the Controlled Coupling Hydra-Matic that some people mistakenly referred to as a Jetaway. Once the turbo 350 and turbo 400 transmissions came out, most of the transmissions dedicated to a specific carline like the Dynaflow, Jetaway, Roto-Hydramatic, etc. got discontinued.
Jerry

Ha................who’s Eisenhower? Engine is a 1960 Cadillac 390. The whole drivetrain is from a series 62. I’m probably using the wrong terminology. Hydramatic?

I liked Ike.

That type of transmission would still be spelt Hydra-Matic in 1960.

Yep, that's a Controlled Coupling Hydra-Matic. Those transmissions came out in 1956, with a major upgrade in 59. I've got one behind a 390 Cadillac engine sitting in a partially finished motorhome Dad started building before he passed away. That project should probably be scrapped, but I just can't bring myself to destroy all his hard work. It's a 61 Cadillac hearse chassis, stretched out and grafted to a 28 foot Spartan aluminum mobile home.
Jerry