10.7 rear disc brakes?

There are cheaper kits out there. But what axle bearings are you using?

If you have the green bearings on the axles you ordered, there are other options. If you went with the stock style tapered bearings with adjusters, your choices are a lot more limited. Dr. Diff's 10.7" rear disk kit can be used with the tapered bearings, most of the others can't.

You should also be careful when buying the cheaper kits and make sure they have a provision for a parking brake, not all of them do.