I am looking for the proper installation spot for my proprtioning valve. I know ever body says it goes in the stock position but where is that? Since my car was strip before I bought it I don't have an idea. I tryed some spots notheing lined up.

Second does anybody have a picture of a completed brake line placement from the master down to the prop valve. I have looked and searched and can't find anything.

Any help would be appreciated.

Thanks

Tom

The proportioning valve mounts on the inside of the drivers side frame rail..They are in the vicinity of the firewall on the driver's side.....Without looking at my car, my (poor) recollection is that it is in the area below the power booster/master.......There are 2 holes in the frame that should line up with the holes in your valve....

Are you looking for year correct placement? I bought new, pre-bent lines when I restored my car and they installed flawlessly...I do not know if they are correctly aligned as they would have been from the factory, but it was certainly an easy installation......Let me know if you want me to take a picture and post it.....or email it directly to you...
Good luck..
Greg

My prebent lines are not bent properly. It just seems that some thing is not correct. It would be nice to see a concourse restored install. I am trying to be as correct as possible.
Tom

There is a clear drawing of this in your assembly manual in the option section.

http://www.chevelles.com/showroom/data/500/master.jpg

I'll take a pic tomorrow of the valve and my lines.....It's kinda dark out right now......Mine's not concourse (as you will see with my 600hp 454) but the lines were prebent when I got them and sure fit easy...
Greg

Is this for a disc/drum or drum/drum brake system? 71SSBB's is for a disc/drum set up, on the 4-wheel drums, the valve is on the inside of the left frame rail mounted by a 5/16" bolt screwed into a hole punched into the frame almost directly below the booster. A good diagram is on page J05-A2 of the assembly manual. The disc brake stuff is on page J52-A1. Correct lines can be purchased from www.rightstuffdetailing.com
BillL

BillL

Here are some pics..I hope they help...The proportioning valve is located on the drivers side frame rail on the inside......Good luck
Greg

Greg
Thank you for the pictures. I am rebending the lines tonite. I plan to tidy up the lines and bring them a little closer to he fire wall.
Thanks for your help. I will hopefully get it under control tonite.
Tom

Bill L was asking, and I guess we still don't know, what kind of brakes you have. Power disc? Power drum? It makes a big difference how the lines run.

Bill L was asking, and I guess we still don't know, what kind of brakes you have. Power disc? Power drum?
Sorry about that. I have power disc brakes.
Thanks
Tom

WOW! This site usually doesn't have this much mis-information.

Since, you brought it up ... I assume you want a "correct" setup. Look at 71SSBB very carefully (even think it's a '68 car). The acorn looking valve is a proportioning/metering valve. It will go about 2" underneath of the master cylinder ... you can see in the picture.

For a "correct" '68 disc setup ... on the frame rail, where Surfingreg is suggesting is a purely distribution block. This does no more than what it sounds, and distributes brake fluid front, back, side, side, etc.

Now the popular conversion (non-original) is to ignore the acorn looking valve, and place a combination valve on the frame rail as described. This was original equipment on '71+ cars, and saves some brake fittings.

When I ordered my stainless brake kit, they would offer a kit for either all original, or converted to combo valve ... depending which one you have, converting vice-versa would probably not be that pretty.

Neal

Neal... Actually they're both correct. No mis-info. My 68 pic is correct for power disc. and the set-up without the metering valve directly under the master is correct for power drum. When the thread was started we didn't know what type of brakes Tom was asking about.

Sorry, I re-read my post ... and it sounds a bit (a lot) conceded. Bad day at work:-)

Anyhow ... I think we're all saying the same thing, just not typing it right.

A factory disc setup will have the metering/prop valve underneath of the master cylinder ... and a distribution block mounted on the drivers frame rail. The block on the frame rail is located in the same spot as later combination valves, and is a popular conversion method, but provides no proportioning function.

A factory drum setup will not have the metering/prop valve underneath of the master cylinder ... but will have the exact same distribution block mounted on the drivers frame rail.

An interesting note on this, if you have access to an original drum car, or converting an existing drum car (as I did) ... the distribution block on the frame is the exact same part as used on disc brake systems.

Neal

A point to remember is that on the set-up you guys are talking about, that "acorn" looking valve under the master cylinder is actually a delay or "hold off" valve and is installed in the FRONT brake lines to delay the activation of the disk brakes until after the rear drums have been activated (it's a pressure override process).

"Proportioning" valves are typically installed in the rear brake line circuit.

I know you guys know this but Tom might not.

Bill, nice ride!!!