I don't even know if it is possible to redrill the rotors to get that 6 on 5 1/2 bolt circle. MIIs usually have small 11 inch rotors. A 12 inch rotor is usually used with the 6 lug pattern. If all you want is disc brakes, there are kits out there that will let you use your stock front axle. If you are looking for the ride improvement then it would be better to change out your rear end to. MII front ends usually drop the front of the truck between 4 and 8 inches... Are you going for the slammed look?