Very pricey but there are no other options outside of van lowers. I don’t have time, equipment, or skill to fabricate my own stuff.
For me and my uses a factory brake system that’s rebuilt and a hydro boost system would work fine. Big brakes would look cooler but I would never use the full capability of a 14” rotor and 6 piston caliper on my street truck.
The eBay seller has uppers, lowers, and lowering brackets for the leaf spring perches so you can keep your axle under the leaf to not notch the frame.