For those folks replacing this bushing with the subframes still on the car, it’s super easy and there is absolutely no need for any PVC contraptions.
To install the new bushing, liberally lube the bushing and subframe hole with brake caliper grease (Syl Glide at NAPA) (not harmful to rubber). Put the torsion bar thru the subframe hole and install the bushing onto the torsion bar with the front washer and nut. You only need to spin the nut on a few turns.
I laid on my back, with my foot in the fender well. Grab the rear portion of the torsion rod, and pull back, using your legs for maximum effort. You may need to twist the torsion rod to get it started, but I found both of mine went in with very minimal effort.
This was the simplest part of the front suspension rebuild, IMO.