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Old 11-15-2021, 08:56 PM   #4
68 P.O.S.
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Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,661
Re: Brake booster/master cylinder/prop valve

Food for thought...1-1/8" bore is normally for power brakes, but it seems some of these trucks did come with a 1" bore MC with PB. No idea what the difference would feel like between the 2.
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72 C10 lwb fleetside -stock 350/350 combo
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