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Old 04-05-2013, 07:46 PM   #1
Erl
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Master Cyl to Proportion Valve Tubing

I have a 68 3/4 ton 4x4 that now has a disk brake front end. I am using a 72 master cylinder, proportion valve and brake booster. My question is how should the tubes from the master cylinder to the proportion valve be connected. I have attached two different photos showing the difference.
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Old 04-05-2013, 08:03 PM   #2
Longhorn 70
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Re: Master Cyl to Proportion Valve Tubing


I just got through with my 3/4 disc conversion and installed the M/C and proportioning valve. According to the instructions I received, it should look like this. Keep in mind this isn't stock and is a disc conversion on a 70.
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Old 04-05-2013, 08:15 PM   #3
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Re: Master Cyl to Proportion Valve Tubing

Top pic looks correct for a 3/4 ton, for some reason they were opposite on 1/2 tons. front to front and rear to rear on halfs.
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Old 04-05-2013, 10:01 PM   #4
TBONE1964
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Re: Master Cyl to Proportion Valve Tubing

Here is mine for a 1972 Cheyenne 1/2 ton 2wd.
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Old 04-05-2013, 10:28 PM   #5
71K20chevy
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Re: Master Cyl to Proportion Valve Tubing

Here's my '71 K20
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Old 04-06-2013, 12:11 PM   #6
Erl
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Re: Master Cyl to Proportion Valve Tubing

71K20chevy your setup looks original. Is that the case?

I had ordered new stainless tubes from Inline Tube and they look like yours. I had not seen that configuration before.
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Old 04-06-2013, 09:03 PM   #7
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Re: Master Cyl to Proportion Valve Tubing

Quote:
Originally Posted by Erl View Post
71K20chevy your setup looks original. Is that the case?
Yes they are.
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