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Old 05-12-2020, 08:42 PM   #9
Mike C
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Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,714
Re: May have finally sorted my less than stellar brake performance...

I'm going spend some time trying to figure out what GM did and when with boosters. I'm sure the early squares were single diaphragm. I have a couple of C2500 trucks both have vacuum boosters and I have a couple of 3500 a C30 and a K30 and they both have hydroboost. The 3/4 ton trucks are an '83 and an '85 and the boosters DO look thicker than the 71-72 trucks so will be interesting to see what I can find.
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