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Old 03-30-2004, 08:24 AM   #1
JIMs70GMC
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brakeline routing

Could use a pic of the MC and prop valve. Need to know which reservoir is for the front and rear. Here's my thoughts rear(large) to front disc and front(small) to rear drums. This is on the 71. Thanks,
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 03-30-2004, 10:00 AM   #2
JimKshortstep4x4
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Talking

Line routing is different for the trucks. Is yours a 1/2 ton or 3/4 ton?

Here is a picture of a 1/2 ton setup.

Jim
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Old 03-30-2004, 10:09 AM   #3
JIMs70GMC
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3/4 ton 4wd w/ power brakes
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 03-30-2004, 10:18 AM   #4
JimKshortstep4x4
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Talking

3/4 ton will hook up opposite from the pic. In the pic the back reservoir goes to the rear brakes since it plumbs into the rear of the prop valve.

On the 3/4 ton the rear reservoir plumbs into the front of the prop valve, and the line from the front of the prop valve goes to the front brakes. I am not sure why it is plumbed this way but I have never seen an exception.

Jim
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Old 03-30-2004, 10:35 AM   #5
JIMs70GMC
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That's what I thought, I got mine reversed. Bending brakelines is a PITA!
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 03-30-2004, 10:48 AM   #6
Dean
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That is correct Jim. Let me know if you need pics of my trucks.
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Old 03-30-2004, 11:08 AM   #7
JIMs70GMC
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Jim, Thanks.
Dean, Always like to see pics of your trucks!
My 70 w/ power drums is different as was the donor truck (70 w/ power drums also).
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 03-31-2004, 08:56 AM   #8
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You are probably done by now, but here is a shot of the routing on one of my K20s.
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Old 03-31-2004, 08:56 AM   #9
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another.
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Old 03-31-2004, 09:36 AM   #10
JIMs70GMC
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Not done yet, been raining. Thanks for the pics. The brace off the front of the booster to the firewall-where does it attach on the firewall? I should have taken better pics prior to disassembly.
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1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs
1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX
1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears
1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now.....
1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone.
1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed.

1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm
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Old 03-31-2004, 09:57 AM   #11
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I can take a picture of the brace. You will probably have to drill a hole for the brace depending on what that cab you are using had. I usually have to drill a hole for my conversions. This last one was a pain because the hole is under all of that factory sound deadening material.
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