proportioning valve questions

Thanks Gerald--yeah I did call Classic Performance Parts....they were less than helpful and basically said I would just need to look up GM instructions because that's all the components they use. None of their documentation online was helpful. I definitely learned a lesson about picking vendors this time around...but now I'm stuck trying to figure out how to use GM proportioning valve with my stock hard line setup. It seems like the best thing to do is to just replace all the hard lines...which is the direction I'm heading. There are two lines for the front cylinders and one 9/16 outlet for the back.