Looking at a '68 B-body, rebuilt suspension. restored 75,000-mile car...
For setting ride height, there's the bolt, the swivel that's captive & the control arm, and the blade the bolt adjusts for ride height.
Car sits even R/L, drives fine except a consistent light pull to the left. (new radials, road crown cambered slightly to right, tire pressures @ 32)
Rt adjusting bolt has about 1/2" thread showing below swivel, but Lt bolt is tight against its swivel.
Is it possible that the arm or blade was mis-clocked during reassembly?
IIRC, it's a hex, so I'd expect that wouldn't translate to the discrepancy; I'd expect more (being 60 degrees per hex face), right?
Never had one with that difference (usually 1/2 inch to an inch exposed thread).
I've never had a weak or failed torsion bar even at over 2X that mileage, and nothing besides that adjustment indicates that's the problem.
But I guess anything's possible, (thinking about it as I type).