[haminator]

Not tp highjack this thread but I have a question about porportioning valve. I understand the concept of using a "disc" brake valve but am wondering why you can't or shouldn't use the drum valve? Truthfully I converted my 70 3/4 ton to disc and kept the drum valve and master cyl. Also did the same on my sons 69 1/2 ton, brakes seem to work great. Is the percentage front to rear the differece? Also chucked the valve on my 70 K-10 years ago while it still had drums and left it off after the 3/4 ton axles went in, still brakes worked great, however it may have locked easier in the rear. Just figured Cmalone may have similiar questions.