I'm planning on putting my old Firestone SportRite #2320 on from my GMT800... that I put on my GMT900... since the frame looks pretty much same on my K2XX as my GMT900. The Hellwig 7800 rear sway bar I had on my previous two trucks fits. Bit tight on the larger 6.2L exhaust but it fits.
I'd put the stock shackles back in and yank the lift block. It'll stiffen it up and reduce axle wrap.
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