Well you have a 4x4 so you have a couple options. First you don't have springs or coils.
Next you will have to buy either the RCD lift, which is discontinued so you would have to buy used, or a superlift with the coilover conversion brackets. There is a member who will make the brackets and sell them. Buying those brackets and the coilovers will replace your torsion bars and give you coilovers with the lift that you want.
Also there is another member that can get you the dimensions to make you own brackets if you have a shop or the know how/tools to do it yourself.
Here are a few links.
This thread which you posted in,
and the member with the plans,
Checking Interest: Coilover bracket models