The BDS knuckles are bought separately out of kit 191H, a local 4x4 parts store was able to get me just the knuckles. They're actually for 4.5" and 6" lift kits. They are roughly 3/4" taller than the Rancho H3 4" lift knuckles. The knuckles cost me 450 bucks.
So, when you order the custom arms, make sure to ask for stock H3 length (mine were made 1/2" longer than stock, and I ended up having to cut my upper mount "slots" out for further inward adjustment). They're made by Michigan Metal Works. They make adjustable and flat plate upper arms for the H3, just order them stock length(or get the adjustable ones), and order them with the Chev 1500 style ball joint taper. My arms were about 900 bucks.
The crossmembers and diff drop(with front driveshaft spacer) were for my original Canyon Skyjacker 4" lift, so for the H3, get your hands on someone's Rancho 4" H3 lift, and replicate their crossmembers (bushings would likely still be available), and the diff drop. Really not too difficult to build. The front driveshaft spacer would be made easily as well, but you could always just get a custom shaft built.
The torsion bar relocators that came with the Rancho H3 4" lift, were in fact made by a different company, Reallift. They made me a set after asking nicely, but they were reluctant due to high steel prices, and not wanting to charge too much. I got them for around 450. They may still make more, but you'd just have to ask.
I'm actually running a H3 steering rack, so do the same as me and run H3 inner tie rods, and Canyon outer tie rods (make sure you get the 16mm for both). And buy/borrow a 7 1/2 degree ball joint reamer (I bought one for 100 bucks) and carefully ream out the tie rod mount holes on the BDS knuckles. Make sure not to over-do it!
The bump stop pads were for the original Canyon Skyjacker kit, I just drilled and tapped my H3 lower control arms and bolted them on (after hanging the suspension but before torsion bars, so I could move up easily to accurately mark where to drill/tap).
The shocks are Rancho RS999309 adjustable, made for use with the Rancho H3 4" lift.
Then you'll need front brakes and hubs, the H3 brakes and hubs wont work with the knuckles. I'm running Timken hubs for the 99-06 Chev 1500 (near identical to the H3 hub, and the ABS sensors are the same). For brakes, I'm running calipers, rotors and pads from a 2007 Tahoe (they're a bolt on upgrade for the 99-06 Chev 1500). I also used the extended brake lines from my original Skyjacker kit. Just order some at about 30" from Summit or wherever.
In the rear I'm running Skyjacker leaf packs for the Canyon (about 2.5" lift) along with some 2" lift shackles
I'm not running any sway bars whatsoever. I do plan on getting some suspension straps from Kartek, and mounting them between the sway bar mount(on the lower control arm), to the frame. This would save from over-drooping and killing CV axles.
I'm 100% certain this would work on a H3. I did my homework
