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Old 01-09-2018, 04:34 PM   #1
dfosh
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Join Date: Oct 2007
Location: greeneville tn
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brake line size again

What size brake line comes out of the new proportioning valves? MY brake lines are from drum brakes and have I/4 down to the cross member and tee off to 3/16. The line to the rear is 1/4 inch back to the rear end then tees off to 3/16 across to the drums .My lines are in good shape and I want to use them with my new disc brakes . I haven't got my new master and booster set up . Can I use the lines I have? Thanks for any info.
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Old 01-09-2018, 09:01 PM   #2
sweetk30
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Join Date: May 2012
Location: horseheads,ny rust belt
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Re: brake line size again

stock 73-87 trucks use 1/4" feed to valve or tee depending on style . then there dropped to 3/16" to each wheel . and the rear is feed 1/4" to hose at axle then hose end splits it to 3/16"
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Old 01-10-2018, 01:31 PM   #3
dfosh
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Re: brake line size again

I forgot to mention this is a 68 GMC .
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