hdj100r suspension

Yes it's all quite possible but probably better to have the rear slightly higher when empty to ensure it's level when loaded. This LINK explains the technical aspects & a phone call to the man in question can sort out a system to suit your needs.
Cheers Craig.............

Bradlez : Just doing this myself at the moment . with bull bar & winch thats a lot more weight on front end . so a up rated suspension < 50 mm lift . I'v gone with EFS torsion bars & shocks

you can just wind up standard torsion bars but that most likely wont last long .

cheers nick

The answer really is to transfer weight to the rear. How I did this was to put a dual spare wheel carrier on then up rate the suspension. We used 600 kg OME coils and Polyairs on the rear and OME torsion bars at the front. The shocks were replaced with Tough Dog Ralphs. End result is a much better lift with less weight at the front so that the downwards momentum when you drop into a dip or sand mogul (or something similar) is less and you do not get a huge downward plunge of the front end that goes all the way to the stops. The vehicle overall does get heavier so I took it to a specialised engineering group at Orangeville outside Sydney and they got their Engineer to go over it and certify it also with an updated the GVM so it is legal at 3758 kilos. They also laser aligned all wheels and when I got it back I could not believe how well it drove. The RTA engineers said the same.