Anyone know where to find a proportioning/metering valve for a 1973 road runner - Part #3642233? This is for power front disk, rear drum setup. Have not been able to locate one so far. Tnx

If you have your original one, you can take it apart and clean it up inside. There have been problems with the reproduction valves so I'd stay away from those.

Len Dawson shows one in inventory.

http://www.dpmotorparts.com/inventory_4_b.cfm

Thanks much... mine is still mounted under the master cylinder, so had not investigated the idea of rebuilding it. If they are serviceable, I can certainly pull it apart and clean it up. I am replacing the brake lines as part of this project as the old originals are pretty corroded and I am having problems with particulates in the brake fluid. Tnx for the advice...

Excellent!! thanks much...

I purchased a kit from Muscle Car Research to rebuild my 1970 Duster manual proportioning valve. It was an easy process. I don't know if there's a difference between power and maual valves but you might want to check out their site.


https://www.musclecarresearch.com/about

If it's the same as what a 73 challenger has, then there are many models just like them. I can't say what all exactly, but I've got the same style off cars built in the 80s.

The valves themselves should be the same. What differs is the style of the mounting bracket. When I was going through mine, I needed an internal part that I broke. A guy I use for a lot of parts had some on the shelf. There were a few different styles of mounting brackets on the ones he had.

If the OP's original valve is still on the car with the lines connected, there is a good chance that it will come apart easily to be cleaned. You run into problems if the valve has been off the car for a long time. The internals can rust up and seize.

For someone taking a car apart for a restoration that uses one of these newer style valves, I would recommend cutting the brake lines and leaving them connected to the valve. That way, you still have fluid inside. It makes disassembly much easier when the time comes.(or at the very least, keep them full of fluid and install plugs in all the ports)