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Old 10-31-2020, 12:41 PM   #1
kens65fb
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Brake Pedal Question ?

It has been mentioned a few times on this forum, that drilling a hole 1 inch lower, where the master cylinder rod connects, provides a better angle to the firewall booster, when adding power brakes.

My question is :

Is the brake pedal on a truck equipped with power brakes from the factory different than a non-power brake truck ?

Is the hole lower than a non-power brake pedal ?
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Old 10-31-2020, 02:43 PM   #2
The Rocknrod
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Re: Brake Pedal Question ?

Quote:
Originally Posted by kens65fb View Post
It has been mentioned a few times on this forum, that drilling a hole 1 inch lower, where the master cylinder rod connects, provides a better angle to the firewall booster, when adding power brakes.

My question is :

Is the brake pedal on a truck equipped with power brakes from the factory different than a non-power brake truck ?

Is the hole lower than a non-power brake pedal ?
They are different. If you have a "Factory" power brake firewall bracket (wedge) and hinge (mechanism) then no (extra) hole is necessary.
http://67-72chevytrucks.com/vboard/s...52&postcount=9


Last edited by The Rocknrod; 10-31-2020 at 09:35 PM.
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Old 10-31-2020, 04:44 PM   #3
raylube
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Re: Brake Pedal Question ?

Quote:
Originally Posted by The Rocknrod View Post
They are different. If you have a "Factory" power brake firewall bracket (wedge) and hinge (mechanism) then no hole is necessary.
http://67-72chevytrucks.com/vboard/s...52&postcount=9

I don't think this answers kens65fb question because either power or non power brakes a hole for the push rod in the pedal arm is NECESSARY.
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Old 10-31-2020, 04:54 PM   #4
The Rocknrod
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Re: Brake Pedal Question ?

You mean it's not unnecessary?
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Old 10-31-2020, 08:48 PM   #5
PGSigns
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Re: Brake Pedal Question ?

The angle is not what gets improved its the pedal ratio and the stroke of the rod.
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Old 10-31-2020, 09:57 PM   #6
Captainfab
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Re: Brake Pedal Question ?

The '63-'66 truck brake pedal has the hole in the same location whether the truck came with manual brakes or factory power brakes. The different ratio for the power brakes was accomplished with the bellcrank assembly on the engine side of the firewall.
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Old 06-17-2021, 06:47 PM   #7
kaycee
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Re: Brake Pedal Question ?

I'm guessing to drill 1" lower I would measure center to center correct?
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