I think a lot of it will bolt right in. But your treading new ground so you'll have to work out the bugs on your own. There was a guy in new zealand who did it so its "probably" possible. You will need the big diff out of the 3.5 gen 2 if you want to run an ARB. Or just keep what you have and run an ARB110 as it fits both.

The upper control arms bolt up. Not sure about the lower control arms, axle shaft length front diff mounts front drive shaft length etc..you'll have to figure it out and let us know.

As far as being "pushed around" thats probably your imagination, or you need to learn when to turn off the locker.

99 Gen 2.5, fixing blown head gasket
89 SWB- 33's, ARB Front locker, SR rear locker/axle, SR F brakes, winch, WST Offroad Armor all Around, 2.85 Aussie T-case Gears (SOLD)
Sold: (2) 95 SR's, 86 SWB, 90LWB, 91 LWB
-Can Change a timing belt in my sleep..