[Dennis B]

Sure could use some advice. I switched my 64 GTO over to front disc brakes that I took off of a 72 GP. I am using the proportioning valve off of the same car as well. There is a 1/4" line that feeds the rear brakes from the proportioning valve to the distribution block at the rear end then splits to 3/16 lines that go to the rear brakes. I have looked all over the place to find a fitting that will go from the 1/4" hard line to a 1/4" braided flex line to feed the rear brakes. Not having found the fitting I would like to know if I can go from the 1/4" hard line to a 3/16" flex line to feed the rear brakes will be OK. This will leave me supplying the distribution block with a 3/16" line going in and 2, 3/16" lines going out. Will this effect the proper functioning of the rear brakes? Thanks.

[Dennis B]

Sure could use some advice. I switched my 64 GTO over to front disc brakes that I took off of a 72 GP. I am using the proportioning valve off of the same car as well. There is a 1/4" line that feeds the rear brakes from the proportioning valve to the distribution block at the rear end then splits to 3/16 lines that go to the rear brakes. I have looked all over the place to find a fitting that will go from the 1/4" hard line to a 1/4" braided flex line to feed the rear brakes. Not having found the fitting I would like to know if I can go from the 1/4" hard line to a 3/16" flex line to feed the rear brakes will be OK. This will leave me supplying the distribution block with a 3/16" line going in and 2, 3/16" lines going out. Will this effect the proper functioning of the rear brakes? Thanks.

[Blackcat]

Keep looking the fitting is out there. You should not have any problem with the back brakes if.. You use the disk brake proportioning valve. I have done several swaps and no problem yet.

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Gatomon
A car is cheaper than a girlfriend. Better than a wife. If it gives you trouble you can park it and forget about it!

[Dennis B]

Blackcat. Did you run #4 1/4" line to the rear brakes, or the distribution block? The speed shop here can't find an Earls fitting that goes from a #4 hard line to a #4 flex. Is there any web sites that you know of that deals with brake fittings? It seems like I had a catolog around that had a bunch of fittings in it but I can't remember where I saw it.Thanks for the help.

[Blackcat]

Dennis,
You can use an adapter to the 1/4 line. This goes from the block to the 1/4 line. Or you could reflare the line with the right fitting. Last choice it using a length of the right line and reducing it to the 1/4 line. Hope this helps. You might have more luck finding the fitting at a local parts store that has Doorman or other drawers of bolts and fittings.

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Gatomon
A car is cheaper than a girlfriend. Better than a wife. If it gives you trouble you can park it and forget about it!

[Dennis B]

Blackcat. Here's the layout. I have the block with two #3 lines exiting to the rear wheels. I have the braided #4 flex that screws into the inlet of the block. The other end of the flex must adapt to the main 1/4" #4 hardline. I need a fitting that has a #4 female to the flex line to a #4 male to connect to the hardline. Im not sure I understand what you meant by reflaring? Am I missing the boat? Dennis B

[Blackcat]

Is this the factory block for the 67-69 style. Or is it the 70-72 style.
You should have 2 lines into the top from the master. One line on the front for front brake. One line on bottom for front brake. One Larger line on the back side for the rear brakes. The larger back fitting needs to be adapted or reduced to the smaller line on non disk cars that goes to the rear. is this what you have?

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Gatomon
A car is cheaper than a girlfriend. Better than a wife. If it gives you trouble you can park it and forget about it!

[Dennis B]

Blackcat. I'll give you a run down from the front to rear. First maybe I should be a little more spiciffic about the set up. I retained the original Proportioning valve off of the AGP. I picked up a new master cyl. for a 72 GP for front disc and rear drum. I have two lines from the master cyl. to the proportioning valve one is 3/16#3 for the front brakes and one 1/4#4 for the rear brakes. These go into the top of the pro. valve. I have two 3/16 #3 lines come from the front of the Pro. valve , one to each front brake. Then I have one 1/4 #4 line from the back of the Pro. valve to the rear end where the hard line stubs off and is attached to a flex line to the distribution block that splits the line to two 3/16 #3 lines, one to each wheel. All is factory AGP set up to that point. Now, I am not using the factory flex line to connect the 1/4" hard line to the distribution block, I'm using a 14" Earls braided 1/4 brake line to make that connection. The only fitting I have been able to find is one that fits the 1/4" flex line but has a 3/16" connection on the other end of the fitting where I need a 1/4" to connect it to the 1/4" feed line coming from the Pro. valve. I know you understand the way this all works so I hope you don't think I'm trying to give lessons on brakes I just want to try and give you a good picture of what it is that I have. Hope this helps. Dennis B

[Dennis B]

Don't even ask what AGP is, cause I'll be dipped if I know. Ment to say GP.

[Blackcat]

Dennis,
Is the proportioning valve the stock one from the original car. If not what did it come from? If it is from the 72 GP it still should have only one line going to the rear brakes. You should only need a reducing fitting from the prop valve to the rear brake line. You can call me Days 512-443-6486

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Gatomon
A car is cheaper than a girlfriend. Better than a wife. If it gives you trouble you can park it and forget about it!