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Old 07-15-2025, 01:56 PM   #1
Chaparralman1974
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Brake Booster Question

Morning gang,

Now that I have been able to finally start moving my truck around, I am finding that I would like a little more stopping power. My K20 is all stock with a drum/drum setup and manual brakes. Everything is brand new including the master cylinder. Can I just add a brake booster to my setup, or do I have to replace the master cylinder as well?



Thanks, Clay
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1967 Chevy K20 "The Town Truck"
Build Thread: https://67-72chevytrucks.com/vboard/...d.php?t=841272
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Old 07-18-2025, 08:36 AM   #2
custom10nut
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Re: Brake Booster Question

Quote:
Originally Posted by Chaparralman1974 View Post
Morning gang,

Now that I have been able to finally start moving my truck around, I am finding that I would like a little more stopping power. My K20 is all stock with a drum/drum setup and manual brakes. Everything is brand new including the master cylinder. Can I just add a brake booster to my setup, or do I have to replace the master cylinder as well?



Thanks, Clay
If we were closer (I’m in East Tennessee), I have everything you need.
I just installed a CPP Disc Brake Conversion on my 70 C-10 (Highly recommended if you’re gonna be driving the truck much), and have all the Drum/Drum Hardware in a box.
To convert you current system to power you’ll need the following:
A longer (Adjustable) Actuator Rod
The firewall brackets and support braces (you have to look for these, because to my knowledge, there are no aftermarket ones made)
The Vacuum booster (I used the factory Delco model)
The rest of your current setup can stay in place.
You’ll have to carefully stretch your brake lines a little bit but there’s plenty of to wok with (or you can replace it, your choice)
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Old 07-18-2025, 08:11 PM   #3
RichardJ
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Re: Brake Booster Question

Your manual brake MC should have a deep hole in the back of the piston. CPP sells their MC with a plug so that their MC can be used with a booster or without.
Ebay sells the plug but calls it a bullet.
You still have to adjust the pin on the front of the booster for correct length.


https://www.ebay.com/itm/285163430346


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Last edited by RichardJ; 07-18-2025 at 08:17 PM.
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Old 07-18-2025, 10:49 PM   #4
Chaparralman1974
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Re: Brake Booster Question

Thanks fellas! I actually found a guy here on the forums that builds a complete booster kit for our trucks that are all adjusted and ready to bolt on. I gave him a call and he is getting one built up for me.


Clay
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