78 chevy need brake line help

mlockwood1311 · 11-03-2008, 09:48 PM

I am restoring a 78 chevy K10 4x4 and I am stuck on the brake lines to the master cylinder. I ran all new brake lines and I matched the brake lines exactly from the master cylinder to the proportioning valve which were very neatly bent and coiled at the master cylinder and appeared to be factory. My question is there is a 3/16" and a 1/4" line attaching to the master cylinder and on my truck the 1/4" line was to the rear (closest to the firewall) which is the smaller of the two resivoirs on the master cylinder. In my haynes repair manual and on an 84 truck that I have it is the oppisite, the larger line connects to the front (larger) resivoir. I have viewed several pics online of various engine compartments in K series trucks and the majority of them seem to have the 1/4" line in the front however I have found some pics (particularly in about the 76 to 79 range) which the 1/4" line was to the rear although some of them did not appear to be factory bent tubing. Is this correct? Is there a difference in the master cylinders and/or does it really matter that much?

87c10slammer · 11-03-2008, 09:52 PM

i dont think it matters on your truck as the valve opens up for each equally but on new vehivcles they do amtter

leolkfrm · 11-04-2008, 04:05 PM

I will try and remember to get a pic of my 77 tomorrow its still original

leolkfrm · 11-09-2008, 12:20 PM

ok pics are on my user page... sorry I forgot to welcome you to the group!

11-03-2008, 09:48 PM	#1
mlockwood1311 Junior Member Join Date: Nov 2008 Posts: 1	78 chevy need brake line help I am restoring a 78 chevy K10 4x4 and I am stuck on the brake lines to the master cylinder. I ran all new brake lines and I matched the brake lines exactly from the master cylinder to the proportioning valve which were very neatly bent and coiled at the master cylinder and appeared to be factory. My question is there is a 3/16" and a 1/4" line attaching to the master cylinder and on my truck the 1/4" line was to the rear (closest to the firewall) which is the smaller of the two resivoirs on the master cylinder. In my haynes repair manual and on an 84 truck that I have it is the oppisite, the larger line connects to the front (larger) resivoir. I have viewed several pics online of various engine compartments in K series trucks and the majority of them seem to have the 1/4" line in the front however I have found some pics (particularly in about the 76 to 79 range) which the 1/4" line was to the rear although some of them did not appear to be factory bent tubing. Is this correct? Is there a difference in the master cylinders and/or does it really matter that much?

11-04-2008, 04:05 PM	#3
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	I will try and remember to get a pic of my 77 tomorrow its still original __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

11-09-2008, 12:20 PM	#4
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	ok pics are on my user page... sorry I forgot to welcome you to the group! __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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11-03-2008, 09:52 PM	#2
87c10slammer Banned Join Date: Mar 2008 Location: levittown pa Posts: 2,197	i dont think it matters on your truck as the valve opens up for each equally but on new vehivcles they do amtter