Technically you can set the torsion bars as much as the suspension will travel. Jack up the front of the VX and measure the distance when the wheels are at full droop and that will be your full measurement. Even if the torsion bar adjustment bolt tightens to a stop, you can remove the assembly & re-index the torsion bar to continue lift.

I had the VX at full suspension lift before and it was really bumpy. With the body lift, I measure 25" to the cladding. If you subtract the BL, we both measure 22" to the wheel well. From my experience recently with SFIFS, I would say you have about 2.5" before you've reach the IFS bump stops.