You can use your existing brakes as-is if you use standard 8 3/4" billet ends.

You can also use hybrid 3.15" bore Mopar housing ends and a Timken set 20 or a Ford sealed ball wheel bearing if you want to bore the center out of your original backing plates.

If a few people are interested, I could probably make a bolt-on C-clip eliminator/axle package for a 9 1/4" rearend.