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I suggest you look into what the factory combination valve does before you dismiss having one or think just putting an aftermarket adjustable proportioning valve in is the same.




The '70 GTX drum/drum unit is just a distribution block.

A disc brake car has a prop valve that regulates how much pressure the rear sees. For this application the current block is just fine, the problem is I'm not getting enough force on the FRONTS, not too much on the rears.






I am not talking about your current problems, other than that problem of thinking you do not need a factory style combination valve. I highly suggest you read up on what they do and why, you're a smart fellow and unlike some here ought to be able to understand it's function.


They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.