Ill throw this in, as I researched the crap out of this years back. As above. 2inch lift ok. 31s not ok - 30.5 ok (as said above for specifics ill not recover).
50mm in lift via suspension, with 50mm, change in diameter with tyres = 75mm total lift.
You'll need to stick with the 30s mate. However, just run 31s, you'll not be pinged.
ADR front bar you can run the uneek baja, its ADR. I do.
However, I run 3inch lift and 33s. I have the wheels in side guarsds and have mudflaps. SYE, breaks upgraded, 4.88 gears (4 speed auto) everything is done right and looks solid. Only looks big once you park next to a stocko..
End of the day, what ever your comforable with and make sure its done right
If you're gunna sweat bullets driving past the cops with 31s, keep your 30s. and drive it