My Challenger, when purchased in '79, had the torsion bars AND the brakes installed on the wrong sides. The drum brake adjusters would loosen when applying in reverse, instead of tightening. The lower control arm adjusters were almost all the way in with the car still sitting too low.
Luckily this wasn't my first Mopar and I fixed it.
If you have the Torsion bars reversed, the Hex indexing is wrong for both sides and you won't get your proper adjustment no matter where you index your lower control arms, with or without the adjuster in.
If one side is giving problems, like one of the posters said here, the supplier may have shipped 2 bars for the same side.
Easy enough to install both new arms on each side, when the adjusters are all the way out, to see where the lower control arms end up.