Drum/Drum

[peanutman]

Not to hijack this thread but were can I buy a new distribution block for a power drum/drum application on my 68?

Do you need a new dis block If your talking the old style(what came on the truck) i don't think available new.

[FORDification]

If you're just keeping the drum/drum setup, it's really not necessary to replace the distribution block, since essentially all it is is a 'T'...though it also does have the pressure differential switch. However, if your switch is broken and you want to replace the whole thing, just check out the Mustang restoration vendors...those cars used the same pieces, though the mounting bracket is different.

https://www.dallasmustang.com/mustang-p ... -1973/9226

However, considering that there's only two small O-rings inside, it would make sense to just replace them yourself and save yourself a lot of money.You can remove the switch and do a quick test with a multimeter to make sure it's functional. From what I understand, the electrical switches aren't available as a single unit, but finding someone on the forums here with a parts truck could get you a good used switch for next-to-nothing.

Here's a picture of a Mustang piece that's been disassembled, for the visual (same piece, different mounting bracket:


(picture courtesy of the vintage-mustang.com forums)

In this picture, the O-rings appear to be squared, but they're not...they're round, like a standard O-ring. After a few decades they've just become permanently deformed.

[FLATBEDFORD]

The tricky part is getting that piece out. I came up with the idea of attaching a short brake line from the Master cylinder to one side of the distribution block and stepping on the brake to force the sliding piece out. Well, it worked. I shot the thing out and into my neighbor's lawn! It took about 20 minutes of crawling around on my hands and knees to find it. Lucky for me they weren't home so I didn't have to explain myself. They came home about 5 minutes after I found it.
I would say, from my experience that the distribution block and the sliding valve are OK and probably never need to be replaced and that the plastic switch is likely the problem.