Torsion Bar adjustment

What is the best way to accuratly set the torsion bars. Right now my truck has a good stance, but it may be sit a little too high in the front end. And if this is the case will this cause my rear end to sag easier with a load? I am running 285's on the truck if this has any bearing on adjustment. I bought the truck used and i think the torsion bars have been adjusted before.

Any help would be appreciated.
Thanks

I made the mistake of trying to do it myself by counting the threads.
Sounded good, but didn't work out very well (for me).

I had a local shop fix it for me and it is MUCH better.

Not sure how they did it, but it measures the same on both sides.

285's also.

park it on a nice flat surface with the wheels straight ahead. make sure the tire pressure is equal all around. i set mine so the front is about 1 1/4" lower in the front by measuring from the ground to the base of the wheel well. after messing with the torsion bars send it to an allignment shop.

do both bolts have to be equally screwed in