Search for torsion lowering, I know we have a couple how to threads with pics, raising it back up will be the opposite of the thread, but the pictures help. And if its as low as you say, you might have to re key the torsion bars when you raise it back up. They are the bolts located at the end of the torsion bar opposite the lower control arm. They are about 1.5-2ft being the front tires. There isn't much trial an error for figuring out which bolt to adjust for the torsion bar. There are only 3 that hold the bar in. 2 on a mount plate on the lca, and one that acts as a spring load at the other end of the torsion bar opposite where it mounts to the lca.
Personally I have fun dragging over rr crossigs (not all, just the ones that show low clearance for semi truck trailer and/or trailer landing gear), and some driveways/speed bumps.