I plan on converting my front brakes to disc on my 69 Skylark, is there a proportion valve that will bolt-in to replace the current valve used on 4-wheel drums, without replacing or fabricating brake lines. I also have power brakes can I use my current Booster and just change the M/C? Thanks Jaye
I did the same on my 71 Skylark. After drilling a new hole in the frame, I was able to bolt the new PV to the original location and tweak the lines to fit. Start soaking them in penetrating oil now.
Ah, would love to know which one you use if it turns out to be that easy. I've always been told they are different connections on the input sides. I'm pretty sure the output lines work but don't trust me on it.
Jaye, 68-70 uses the same block down on the frame,and added a second valve,that mounted next to the master cylinder. I have one of the upper valves,if you are interested.
Brian, So, I keep the block on the frame and add another one under the M/C, can you please send a PM with asking $$ and pic ship to 29016. Thanks Jaye P.S. the 12 bolt I got from you is riding great!
Send me your address,and I will send it down. I also have a disc master cylinder that it was mated to. Hook it all up and try it out. We can figure out money after you get it stopping.
The current brake line block you have for 4 wheel drums is a distribution block. You can keep that to run your rear brake lines, however, you need to add the proportioning valve for your disc brakes. Personally, I would eliminate the distribution block and just put in a union fitting and then run the rear brake line to the back of your new disc/drum proportioning valve that will mount off your master cylinder. Less chance of leaks due to eliminating unecessary connection points. The new proportioning valve will have 3 ports. 1 for rear drums and 2 for the front disc brakes. Also, like some of the other guys have mentioned, the front disc master cylinder is different than 4 wheel drum. Right Stuff brake conversions has what you need
A drum/drum master is 1 1/4” bore. A disc/drum master is 1 1/8” bore. A disc/disc master is 1 1/6” or 1” bore.
