I have completed the front disc brake installation in my roadster pickup, and I am curious about setting the adjustable proportioning valve in the rear brake line. As I remember from a similar installation about 13 years ago, you set it so that when the brakes are applied, the rear drum brakes engage slightly before the front discs, so as to keep the car in a straight line when stopping. First question---Have I got that right? and, Second question---How the heck can you tell something like that???---Brian