Suspension rebuild first time

You can just slide the torsion bars back, no need to take them all the way out. If you do, be sure to mark them left and right and put them back in the same place.
I would just use a chain fall or an engine hoist to lift the engine a few inches. Let it hang until you get the K frame swapped and then just drop in down in place.
The K frame bolts are usually not bad to get out. You will want to use an impact gun.