Our TJs don't have torsion bars but no, nothing will have to be modified to install a 2" spacer lift. You MIGHT have to drop the transfer case skidplate 1/2" with spacers (stacked washers work) & longer bolts perhaps if the 2" lift causes a minor drivetrain vibration but that's about it.
You will have to adjust the toe-in and straighten the steering wheel after installing the spacers but both of those are extremely and non-technical on a Jeep. Here's how... Basic Jeep Front End Alignment
And a big welcome to WF.