Re: 69 3/4 ton power drum brakes pro valve pic request
not sure if this helps or not. i actually just changed out the master cylinder today. no power, though.
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1969 GMC 3/4 ton, 307, 4-speed NP435GL, DANA 60, 4.10, HD rear leafs, manual everything, leaking oil and water. Now rocking 383, NV4500, power steering, power brakes. Finally undergoing restoration.
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