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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

Dual master cyl swap - lines?

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Old Jan 25, 2026 | 09:44 AM
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Dual master cyl swap - lines?

I bought a dual pot master (for a '67) to do the swap on my '65 F100, keeping the drum brakes all around since they are new shoes. I've always thought the rear (bigger) pot was for the front - at least with disk brakes), but this new one has similar sizes.

Which reservoir/outlet should I use to feed the front brakes?
 
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Old Jan 25, 2026 | 05:28 PM
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Unless the instructions/manufacturer state differently, the rear port (closest to the firewall) is for the front and the front is for the rear.
 
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Old Jan 25, 2026 | 05:38 PM
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Are you also upgrading to power brakes at the same time? You really should.
 
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Old Jan 25, 2026 | 07:58 PM
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Thanks for the replies. No power booster, for now...
 
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