Owosso here. As for suspension mods you really only have two choices right now...torsion bar crank (DO NOT waste your $$$ on a key kit, it's not needed) or a solid axle swap. Rancho was the last company to sell lifts and they are all sold out at last check, unless you can find a used one. Most other parts can be found through many other sources from the autoparts stores, I know that Autozone moved all their H3 parts to the Davison store. GM parts direct, Rock Auto and Amazon are good sources too. There are some aftermarket parts available from Schwarttzy, Outfitter Design and Scorpworks.