If you want disk brakes, and a bolt up conversion, and keep it 8 lug, find a 3/4 ton 8 lug full size chevy 4x4.
You can use your axle shafts, then everything from the ball joints out from the chevy. But you gotta get the brake backing plate. My 1/2 ton ford D44 used a bolt and a wedge to hold the caliper on, the chevys use a brake mounting plate and two allen bolts to hold the caliper on.
Sky makes a great high steer arm. It's called the Dana44 tall arm. It's a beefy ass arm, it lifts the drag link or tie rod about 2" above the mounting service, and it uses the factory studs so no stud kit is required, and there's no need for a steering block. The TREs used for this arm are the 1 ton GMs that everyone is so wild about. The arm is 108 bucks with shipping.
Now how are you running your steering?
Knuckle to knuckle (with high steerm arms?) tie rod with a drag that intercepts?
Drag link that runs to pass. knuckle and tie rod that intercepts near pass knuckle and runs to driver knuckle?
Drag link that runs pitman arm to driver side knuckle and knuckle to knuckle tie rod?
Good luck and remember that extended shackles in the front give a lot more leeway for the axle to move under articulation or even hitting bumps making steering sketchy. Also, make sure you get your tires balenced well. You'll really notice shit with leafs.