You cant just swap the 3/4 ton rotor on and roll. Will narrow the front way to much. Will hit the brake booster etc. You will run into lift issues if you narrow the stock control arms as the upper ball joint will hit the bag at full lift. Here is a mock up pic. Coverted to a 3/4 ton non-dually hub which is about 6 inches narrower then the dually hub. Then built 3 inch wider control arms to give some drivability back along with 95 percent of the turning radius.
The arms use factory lower ball joints with uniball uppers.
Heres mine. Need to narrow the front to tuck the 10 lug on the semi.
Dont mind the wrinkled fender. This is an OLD pic.
Built the arms for this truck. 22s in front. 24s in back.
Also i am rite in the middle of doing a 92 up for 24s. Built the new arms yesterday. Ill post pics up monday or tuesday if you want.
Actually here is the last pic of the day yesterday. Steering will be heimed like the above pic. Shows the advantage of the longer arms via shock location. Yes the shock "tower" will be braced. This is just for mock up and cycling of suspension.