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Old 12-01-2006, 12:28 PM   #1
GMCBubba
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3/4 ton master cylinder

Is the master cylinder for the 3/4 tons any different than for the 1/2 tons? When i searched for parts on advance auto's web site, it brought up masters with 1" and 1 1/8" diameter bore. Which one do i need?

I have manual drum/drum set-up. thanks
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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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Old 12-01-2006, 12:49 PM   #2
Southedisto
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Re: 3/4 ton master cylinder

http://67-72chevytrucks.com/vboard/s...light=freaking
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Old 12-01-2006, 06:49 PM   #3
Longhorn Man
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Re: 3/4 ton master cylinder

yes, they are diferent.
you need one for a 67 - 70 3/4 ton or one ton truck. power brake and manual brake use the same part number on these trucks.
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Old 12-01-2006, 08:06 PM   #4
GMCBubba
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Re: 3/4 ton master cylinder

thanks longhorn, you are always a wealth of information.
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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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