so 5th gen 4R (ergo 150 chassis) has same KDSS RSB brackets on axle as KDSS GX470 (ergo 120 chassis)? but GX460 KDSS brackets are slightly different (outboard). So @JLee, you're confirming KDSS 5th gen 4R 8.2 axle swaps directly into 470s, whereas a 460 KDSS RSB does not (previously reported). Thank you.
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A 5th gen 4Runner with KDSS has the same KDSS brackets as a KDSS GX470. Most 5th gens don't have KDSS, so they would have different sway bar brackets.
The part number for a GX460 rear sway bar is 48805-60160: 48805-60160 - Genuine Lexus BAR SUB-ASSY, REAR STABILIZER This part number cross references to 2010-2019 4Runner with dynamic suspension: 2010-2019 Toyota 4Runner Stabilizer Bar 48805-60160 | Camelback Toyota Parts
Based on this I can comfortably state that the rear sway bar is identical between the GX460 and the 5th gen 4Runner. Given that we know that 5th gen 4Runner axle-side KDSS brackets are identical to the GX470 KDSS brackets, and we also know that the 5th gen sway bar is the same part as the GX460, I expect a GX460 rear axle would also bolt into a KDSS-equipped GX470. They do have 3.91 gears vs the GX's 3.73's, though.
The 5th gen Trail w/KDSS is the unicorn GX470 KDSS axle, as you get a locker, KDSS brackets, and appropriate gearing.