I have recently converted my rear drum brakes to rear disc and upgraded the front to dual piston calipers on my 89 S15 Jimmy 4.3L Auto 2wd. I used parts from a 2000 Bravada (4WD) for the rear & 2000 S10 2wd for the front. My car stops much better in all situations. I also added a G80 in the rear of my 7.625 rear end which required a new ring/gear set due to the carrier breaks. Motive gear makes a 3:08 thick gear set for the G80 carrier so I was able to keep the original gearing. I have a rear sway bar ready to install from a 2WD S10.