The new pork chop only have a different clocking of the hex feature in regards to the arm. What the new pork chops do is allow a little more twist.
Look at it this way, if you jack up the vehicle and loosen the torsion bar there might be 1" of thread left at the top when the torsion bar are relaxed and there is no tension. The new "lift" pork chops might only allow a few threads of the bolt or might have to disconnect the shock to allow the lower control arm to drop further to get the new pork chop installed (then put on the ground and reinstall the shock).
So in turn the new prok chop will only give your torsion bars a little more angle when they are maxed out. The H3's have enough adjustment left from the factory to get the front level and possible more than the rear.
The HUGE down side to this is Chevy designs all there vehicles to almost ride on the bumpstops. This is the nose dive effect you feel when braking ( or the effect you do not feel when torsion bars are set correct). If there is a large gap between the bumpstop and lower control arm the bumpstop will not function as it should be preventing. The bumpstops are soft & progessive and act more as a damper. There are more cons than pros to changing out the distance between the bumpstop and control arm.
In summary, unless you have tried to max out your torsion bars and get the height you want, there is no point in wasting your money on some new pork chops (not to mention the stiff ride you will have). If you max them and still want more, the new prok chops is the way to go.
Hope this helps!
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