Quote:
Originally Posted by Billy Nees
There is no "proportioning valve" in your 85 Firebird. What you are seeing is a "check" valve that will flip one way or the other if your front or rear brakes fail. Leave it there. Make sure that you get your pedal ratio close to correct!
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actually, it's called a combination valve and it does both...
but no, you don't have to change it (unless you're changing the rears to disc)