I converted my '67 to front disk and bought an adjustable proportional valve. I belive the block on the frame is just a distribution block . Does that mean I can put the adjustable valve anywhere in line for the rear brakes? I'd like to mount it directly to the port coming out of the master cylnder.

I have read two different opinions on this one saying that it should be after the distribution block and the other in front, I mounted mine between the master cylinder and the dist block and it works fine.

Guys. I am not sure I get the right picture.

To answer Rat's question first : the adj. prop. valve is meant to adjust the pressure to the rear drums to prevent premature lock up. This means the valve goes in the front-to-rear line, anywhere you want.

Reading your question I am not sure you have the correct picture. If you do, please ignore the following.
When converting to front discs (keeping the rear drums) you should replace the old drum-drum M/C by a disc-drum M/C. This type will have 2 chambers and thus 2 outlets. Subsequently you cannot use your old drum-drum distribution block because front and rear brakes circuits must be separated. The adj. valve should go in the rear circuit only.

Rob

Let me help you understand a little better. The old master cylnder had two ports, front and rear. Just like any other mastercylnder. I replace it with a power brake mastercylnder. I've heard the adjustable valve goes in line after the stock proportional vale. Since the '67 does not have a propotional valve (so I'm told) but a distibution block I was wondering it it mattered where in line it went.

Originally posted by Bad Rat 414:
Let me help you understand a little better. The old master cylnder had two ports, front and rear. Just like any other mastercylnder. I replace it with a power brake mastercylnder. I've heard the adjustable valve goes in line after the stock proportional vale. Since the '67 does not have a propotional valve (so I'm told) but a distibution block I was wondering it it mattered where in line it went. If you put the adjustable valve between the master and the dist. block, you would be regulating pressure to ALL 4 wheels. You only want to do it to the rears so the adj valve should go after the dist block. I am just running 2 adj. valves so I can fine tune the brakes as needed. It's worked pretty well for 2 years.

Jeff

Originally posted by Bad Rat 414:
The old master cylnder had two ports, front and rear. Just like any other mastercylnder. Only dual master cylanders have to ports. MANY chevelles came with MC's with only one...just mt $.02

Originally posted by jpete:
If you put the adjustable valve between the master and the dist. block, you would be regulating pressure to ALL 4 wheels. You only want to do it to the rears so the adj valve should go after the dist block. I am just running 2 adj. valves so I can fine tune the brakes as needed. It's worked pretty well for 2 years.

Jeff [/QB]I don't want to make this hard because it's not. I hear what your saying but. If I put it on the line comeing out of the back of the mastercylnder going for the back brakes before the distubution block, how will that affect ALL 4 wheels?

Well, I put mine after the block so that pressure going into it would be equal on both sides and not trip my brake warning light.

I don't know if that would really be a problem or not. The pressure might be equal enough.

Tim.

TronDD, THAT makes sence to me. I think your correct. I just didn't want to have to get under the car to adjust it.

Originally posted by Bad Rat 414:
</font><blockquote>quote:</font><hr />Originally posted by jpete:
If you put the adjustable valve between the master and the dist. block, you would be regulating pressure to ALL 4 wheels. You only want to do it to the rears so the adj valve should go after the dist block. I am just running 2 adj. valves so I can fine tune the brakes as needed. It's worked pretty well for 2 years.

Jeff I don't want to make this hard because it's not. I hear what your saying but. If I put it on the line comeing out of the back of the mastercylnder going for the back brakes before the distubution block, how will that affect ALL 4 wheels? [/QB]</font>[/QUOTE]Sorry, check that. I was thinking a single master not a dual reservoir. I didn't really pay attention when I did mine. I was doing the B-body swap at the time so I didn't even look how the OE system was set-up and just dumped everything without looking.

Jeff

;) ;) tongue.gif

Tron's strategy seems pretty good to me.