I know a lot of you guys have done the rear disc brake mod. Their seems to be a lot of questions involving master cylinders, proportioning valves, which calipers to use, which booster, etc. I think it would answer a lot of questions if those of you who have already done the swap could post up any problems you came across and their solutions. Include in your post the following items(in regards to the brake system): what your rig was equipped with originally, what changes you have made from stock, do you drive it on the street often, do you tow/haul with your rig, are your brakes proportioned correctly,are you using a parking brake,what problems have you encountered, what actions did you take to resolve those problems. Please feel free to include pics, and part numbers. Anyone else that has any questions to add by all means do so. I am hoping this will clear up the gray area when it comes to getting the brakes proportioned correctly for on and off road use.