Front Disc Brake Conversion Confusion

DrEamer said

PST is a site vendor, that I believe gives forum members a 10 percent discount, as to their quality, I don't know. The reason I brought up Doctor Diff, is because I have bought quite a bit of parts from them, and I know them to work. Also, Cass has answered any questions before, and after the sale. I'm sure the PST stuff is all right.

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Thanks, Dr Reamer. I understand what you're saying. I can certainly appreciate good help from a vendor.
I'm up in the air on this one. I'm going from Wilwood and the related parts (most expensive, I think), and redrilling my 9" drums for my Prostars 4 1/2 BBP and using an adjustable proportioning valve (least expensive, probably).