The Front Range Off Road bracket was made to adapt the Taco rotors and calipers.
I went larger and went with the later Tundra stuff (03-06)
Parts required:
86-95 IFS wheel bearing hubs, OD must be turned down a touch to 6.680"
Tundra front rotors, i ordered 06 units although i think the rotors are all the same.
There are two styles of calipers, the earlier smaller 199mm units casting # 13WE and the later upgraded and larger 231mm casting #13WL.
The Tundras appear to have had a brake problem in that the rotors would heat up and warp.
There is/was a TSB and thus the upgraded, larger caliper.
On the landCruiser i doubt that the smaller, earlier caliper would pose a problem, i went with the larger due to the 42s i am running.
Rim size and interference you can figure out for your self but with the smaller calipers 15's may fit with either the right spacer or the right offset.
I can get my 15"s to fit with the large calipers but only with a 4" back space and a 2" spacer, and then JUST.
The 4 runner hub change alone will widen the track width by 3.25".
I did not look into the Taco brakes so i don't know about what year Taco parts to use or what wheels will fit but the hub parts remain the same.
Knuckles need to be switched side to side, placing the caliper ears forward or the ears removed completely.
I chopped mine off, but i have the SixShooters and they have front and rear mounting ears.