WTB power drum/drum proportioning valve

[67mater]

I am hoping to use the master and booster off my 72 donor, but it was setup for disc front. Anybody got a proportioning valve for power drum/drum?

Thanks!

[Bpokey]

I have a power drum/drum setup I believe and I am looking for a power disc/drum. If you still have the disc/drum prop valve would you like to trade?

[Bpokey]

Here is a pic of what I have.

[67mater]

I do have the disc/drum prop valve, but not sure on trade (wanted it for when I go to disc). Also, do you know if that's different that regualr drum/drum prop valve?

[myoldchevytruck]

Originally Posted by 67mater

I do have the disc/drum prop valve, but not sure on trade (wanted it for when I go to disc). Also, do you know if that's different that regualr drum/drum prop valve?

67mater, The Master Cylinders are definetly different. The drum/drum M/C has 2 small fluid reseviors where the disk/drum M/C has a larger front/smaller back reseviour. The drum/drum setup has a fluid distrobution block (as in Bpokey's picture) whereas the disk/drum is a prop valve. I am swapping to a disk/drum setup so my drum/drum setup is for sale.

[67mater]

so what your saying is that the enitre getup needs to change to Drum/drum? Well, mayeb If that's the case, I'll hang onto my setup and put the manual drum/drum setup from the 67 on.

thanks guys!!

[Bpokey]

Thanks for the info myoldchevytruck. I guess the PO of my truck did a disc brake conversion and didn't bother to change anything but the rotor/calipers. Do you know the best route to finish the job? I have seen some trucks with the later model booster/master cylinder, is this better? 67mater, I hope all works out with your brake issue. Thanks.

[msgross]

Boosters only mater from 1/2ton to 3/4 ton etc...

correct in the MC and distro block for drums, I have one available as well if anyone needs it.

B-pokey, you need to find a disc/drum MC and prop valve to complete yours... How's it working right now? MC's are cheap at autozone but prop valves are a little higher.... i suggest just buying them new from there if you are looking to complete yours... Or if you feel that it works fine now then stick with it...

[67mater]

So, can the MC and distblock original to my 67 3/4 ton drum/drum manual brake setup work with the booster from the 72 3/4 ton power disc/drum setup?

Aside from having power, I believe i need the booster to mount to the firewall as there are 4 bolts, not two for just the MC.

[Bpokey]

Thanks msgross. I am not sure how it drives yet. I have only driven it from the trailer to the garage and even then it had a stuck caliper. I had planned on the new MC and I guess I will just have to find a prop valve. I didn't know if the lines were different from disc to drum. Good to see all the veterans on here. I am at 12 years in the Navy on my way to 20. Thanks again.

[msgross]

Originally Posted by 67mater

So, can the MC and distblock original to my 67 3/4 ton drum/drum manual brake setup work with the booster from the 72 3/4 ton power disc/drum setup?

Aside from having power, I believe i need the booster to mount to the firewall as there are 4 bolts, not two for just the MC.

might work? the booster also has brackets... power drums is better manual drums so go for it...

Originally Posted by Bpokey

Thanks msgross. I am not sure how it drives yet. I have only driven it from the trailer to the garage and even then it had a stuck caliper. I had planned on the new MC and I guess I will just have to find a prop valve. I didn't know if the lines were different from disc to drum. Good to see all the veterans on here. I am at 12 years in the Navy on my way to 20. Thanks again.

Be careful, I think you need to buy a new MC and prop valve to be safe. Hart_Rob just moved from Pensacola to NM but he still has trucks there. Good guy and a naval officer too...