Right, but I was speaking in general terms. As a rule of thumb, 4 wheel disc systems don't use a proportioning valve. That's not to say you could not plumb on in. The one in his original post though, I don't believe will work as it if for disc/drum if I am not mistaken.
correct, properly designed and engineered 4-wheel disc systems generally do not need a prop valve OR they have one built into the distribution block.
the devil meets the details there, with "properly designed and engineered" which, again, generally means a factory system-- not a hodge podge of parts thrown together.
@72bluNblu summed it up succinctly: there's a lot of factors that go into whether you need one or not and basically for something like this his suggestion of just putting it together and seeing how it shakes out might be the best course of action.
as to whether the distribution block from the initial post will work or not, i can't say-- if has a proportioning circuit built into it, then it would be best to avoid. if it's just a distribution block then it would be fine.
