OK, UNLESS YOU GET THE FRT BRAKES WORKING THE REARS AREN,T GOING TO HELP YOU A WHOLE LOT , THERE IS NO EASY SWAP FOR THE FRONTS , 87 WAS THE CHANGE OVER AND CAN BE EASILY UP GRADED TO THE NEWER TROOPER OR RODEO FRT BRAKES ,, THE REARS AS MICHAEL MENTIONS , THE BRAKE CABLE IS A WORK OF ART ON YOUR PART , THE REAR DRIVE SHAFT YOKE WILL HAVE TO BE CHANGED AND THE SHAFT NEEDS TO BE SHORTNED ABOUT 1 1/2 INCH, 87 ,S NEVER HAD DISC BRAKES,IN THE REAR, HOWEVER 88-91 TROOPERS WITH THE DISC,S AND THE CORRECT GEAR RATIO WILL BOLT RIGHT IN AS FAR AS THE SPRING PERCHES GO, THEY ARE THE EXACT SAME WIDTH, BRAKE LINES WILL HAVE TO BE MODIFIED SLIGHTLY, BRAKE CABLES COMPLETELY DIFF THAN THE DISCS SETUP, BUT CAN BE DONE , YOU WILL GAIN A SLIGHT INCREASE IN TRACK WIDTH AS THE LATER REAR AXLE IS A BOUT 3 INCHS WIDER FLANGE TO FLANGE , PICKUP TRUCK AND RODEOS ARE ABOUT THE SAME WIDTH BUT THE SPRING PERCHES ARE WIDER APART AND YOU HAVE TO BE REAL CAUTIOUS ON THESE AS NOT MANY OF THEM CAME WITH THE 4.56 GEARS AS YOUR 86, A LOT OF 4.10,S AND A LOT OF 4.30,S . NOT TRYING TO SCARE YOU OUT OF SWAPPING THEM OVER , THEY MAKE A GOOD SWAP BUT IT IS NOT A WEEKEND DEAL ON THE 86 IF YOU DO IT RIGHT AND SAFELY,ON AN 87 YOU CAN SWAP THEM OVER IN JUST A FEW HOURS, DISCS IN THE BACK AND LARGER DISCS UP FRT .. GOOD LUCK JERRY