Ok, I have a question. What about leaving everything alone (going with the "if it ain't broke don't fix it" theory) and swapping out axles to full width and rear disc's? The rear proportioning valve was designed for drum brakes right? I know some of you guys on here have switched to rear disc, so what did you do? Just leave it alone or take it out? I'll also be running a Ford 1 ton master cylinder, at least that's what I was told to run. Just let me know what you guys think. Thanks, Shawn. 8)