I changed my brakes to discs in front, drums in rear. I have searched a lot and now I am really confused!! I removed the combination valve from the frame and have a prop valve for the disc, drum setup. My question is which one is correct for my setup. The pic shows the doner part on top and the brass one is what I removed. This is a 1971 el camino and was originally a manual drum car. All help is appreciated!! I am in the middle of this now and have gotten stuck. If someone has pics of where the lines go as well They would be appreciated. Thanks. Chef

http://i33.tinypic.com/2rxtmp2.jpg

This may not help you, but I installed my prop valve between the back end of the distribution block that feeds the rear line and the M/C rear line outlet.

I went from manual 4-wheel drums to manual 4-wheel discs.

pdq67

i THINK i AM EVEN MORE CONFUSED NOW... I think that I need to know which of the pictured valves I am supposed to use. Ihave discs up front and drums in the rear. Paul thanks for your help, but I am still confused. Chef

The one on the top is the one you need. I'll provide pics later. i'm watching the steelers game now.:thumbsup:

thanks a ton Ron!! i will be waiting. whenever you have the chance. chef

Click on link, go to left side column and click on proportion valves, something to read while you wait for Ron to post back with pics. inlinetube.com (http://inlinetube.com/)

The top two ports go to the cooresponding master cylinder ports. The largest port on the rear of the valve goes to the rear brakes. The front and bottom port goes to the front wheels/calipers.

I used the INLINE TUBE hard line kit along with a prop valve bracket to mount the valve just below (to the driver's side) the master cylinder.

The 1971 GM disc and drum valve does not require any addition valves as the previous years did. Be careful when you bleed the system.

You may find the prop valve to get "off-center" and apply all pressure to either front or rear.

If this happerns crack the bleeders on which ever half is getting all the pressure and slowly press the brake pedal and then lock the bleeders down (have a friend help) before the brake pedal is released so as to eliminate any air from entering the system.

You may have to do this a couple of times to get the valve centered.

Hope that helps.

jim

Thanks for all of your help. I will hopefully get it done tommarrow after it stops raining. chef

http://memimage.cardomain.com/ride_images/2/4556/3061/23889030406_large.jpg

Here's one angle.:thumbsup:

Thanks a lot Ron!! It was exactly what I needed. You guys are the greatest and this truly is the best site online!!! Chef

This is a 69 chevelle, and it sounds like your all set, anyway thought I would throw in this picture if it might help.

http://www.1969supersport.com/rockerpanel.html

Rob