I pulled the trigger on the Strange Pro/Race rear disc brake kit and proportioning valve for the Duster. I have Wilwood four piston calipers in the front and have killed two sets of rotors and recently after hitting them hard at Famoso a few weeks in the final things got a bit hairy. It's been obvious to me that the fronts have been doing most of the work the last few years (to much imho). I know that the front should be biased more, but I find about every track I go to I'm using the last turnoff. Keep in mind we're only trapping at 140 + or - a couple mph. The car currently has a 15/16 master and only what I believe is a distribution block after that before the calipers/wheel cylinders. Any tips on where to set the proportioning valve, or test tools to aid in the adjustment would be appreciated.

forgot to add.. currently running stock 70 drum set up.