I tried searching first and didn’t find exactly what I’m looking for.
Im in the process of installing a CPP 4 wheel drum to disc conversion on my 71 Cutlass.
The kit came with pre-bent lines, new MC, booster, and proportioning valve.
i removed the original distribution block from the frame rail and am now stuck on how to mount the new proportioning valve.

Given that all of the lines are pre bent, I’d like to install it in the same place as the old distribution block rather than relocating it and buying all new lines.

So….what I’m in need of is input regarding how to mount the new proportioning valve on the frame rail. The valve has two holes in its body for mounting. But it did not come with bolts/screws or any sort of bracket. Are there pre drilled holes on the frame I’m not seeing?
Anyone know if there is a specific length/size bolt/screws or any I need to obtain?

CPP’s website, YouTube etc have turned up negative in my searching.

thanks in advance!

 

You should call your vendor and ask them where to put it. If your vendor is in China, you should reconsider your chosen path in brake modification.

The brake distribution block used one hole to mount. There is no reason to expect the frame to have random holes where you need it. The frame might have the 2 holes for the combination valve on disc/drum cars if they put them in there regardless of which brakes were chosen.

 

Aftermarket vendors sell a multitude of disc brake conversion kits, some with lines pre-bent for the OEM combo valve location and some for the non-stock location under the M/C. Do you know which kit you have? Also, the OEM combo valve was cast iron. I assume your aftermarket kit has the Chinesium brass combo valve. The OEM valve mounted like this. Those two bolts attach to the bracket and the bracket mounts with self-tapping screws into pre-drilled holes in the frame rail. One of those holes was probably used for the bracket for the drum brake distribution block. We have no way of knowing if the aftermarket brass combo valve has the same bolt hole locations as the OEM valve or not. By the way, note that the factory had three differently-calibrated combo valves, one for station wagons, one for power disc cars and one for the manual discs used on W-30s. The aftermarket has one-size-fits-none.

 

Here is a photo, prior to removing it for painting the frame, pretty much the same as Joe's repair manual photo (below the steering shaft, back by the firewall).