it probably is....but you could also just buy the torsion bars, and get some Ford F-150 coils for the rear lift, or Jeep Grand Cherokee coils. They both will give you added lift in the rear, and are MUCH cheaper than new ones.....check local scrapyards. Then, with the new torsion bars, you'll be able to crack them up to level out the front. Whether you get the kit or not, you'll need an alignment afterwards, so the new A-arms may, or may not be worth it. It also depends on how good, or bad, your current shocks are...
I know Jim has the Calmini torsion bars in his Pathy, and he's said he likes them.