Quote:
Originally Posted by sailed2japan
I forgot to mention, If you switch over to rear discs you also need to install a disc/disc master cylinder and proportioning valve. I'm sure you guys who have done it know this, but since I hadn't seen it brought up in this thread before I figured I would. Now as far as where to get one, I don't know. I know that the 88-98 3500HD's (the ones with a straight front axle) used hydroboost and had a disc/disc set-up with a either a Dana 70hd or 80 which it was illudes me at the moment. You may be able to use that master with the 73-87 booster. this is an avanue I was looking to explore.
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There is no need to change out the master cylinder or prop valve when giong to rear disc, unless the truck was originaly equipted with drum brakes all the way around. GM used the same prop valve and master for both setups on the square bodies.
