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Old 09-21-2021, 12:03 PM   #4
Caddylackn
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Join Date: Jun 2016
Location: Bremerton, WA
Posts: 171
Re: Drum to disk brake conversion on 1967 C20

The problem with rear disc brake kits is the parking brake. The rear disc swap kits usually use the cadillac eldorado type rear calipers with the cable operated rear parking brake. The cable disc parking brake arrangement is usually too weak to hold a truck with a load on any hill. Unless you have a manual with a granny gear this will be problematic if you have a camper or a load.

To overcome the weak rear parking brake, you can add a line lock on the hydraulic brake line or use the motorhome type turbo 400 which has the drum parking brake on the output shaft.
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1969 Custom Camper C20; Factree Air, 350/TH400/Dana 70U with C30 wheel cylinders, Disk brakes, H4 conversion, headlight relay mod, 3G 135 amp alternator. 7500 GVW
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