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Old 10-09-2020, 07:11 PM   #1
tinman_local2
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Join Date: Jul 2015
Location: Smithton, Mo.
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Manual drum to power disc conversion

Looking for some clarification on brake booster and M/C for my K20. What I have is a 69 cab from a c10 that had power drum brakes. I am using the brake pedal and firewall bracket from the c10 on my K20. I am also swapping in a Dana 44 from a 78 K20 so I can have disc brakes. My question is...can I use a new booster for a 69 C10 and a new M/C for a 71 K20? I know the drum brake and disc brake use a different M/C, but will the C10 booster work with the K20 M/C? Hopefully I haven't confused everyone as much as I am. Thanks in advance.
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Old 10-09-2020, 10:31 PM   #2
gmc684x4
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Join Date: Jul 2012
Location: Whitehorse yukon
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Re: Manual drum to power disc conversion

Rock auto list them as different part numbers 69c10 booster and 72 k20 booster

Might be tied to master cylinder bore size

I have taken one from my 70 k20 put it on my 70 k10 with no issues
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Old 10-10-2020, 07:43 AM   #3
Mts67C10K20
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Location: Dowagiac Michigan
Posts: 202
Re: Manual drum to power disc conversion

The booster on a k20 should be a dual diaphragm I believe
For stopping a heavier load
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