Howdy bloke, 2" is roughly 50mm and I'm pretty sure that lift will bring the radiator fan down past the radiator shroud/cowling. .
If you don't want to mess with cooling and keep the shroud you might want to measure the distance between the fan and shroud/cowling and see how much you can raise the cab. .
I did mine about 35mm, you can keep the cowling and it doesnt mess with the 4x4 gear shaft rubber boot etc in the cab. ..
The trick with the wollopers is they measure your roof hight so it doesn't matter where the hight comes from, if its over 50mm in total hight from standard hight they CAN ticket and pull your unit off the road.. each state differs with these laws.. check...