'66 Barraduda front suspension won't adjust down one on side

In my case, the arm and the adjuster bar/anchor are rusted together, thereby not allowing any ride height adjustment. I hope to have it freed up in the coming days.
Sorry I got here late, lol, yeah the frt T-bar socket/arm would have to be frozen together...that's the only thing that can do that. Either by rust or damage/deformation of the arm. Those West-Coast guys don't know what it's like to deal with that stuff, lol!!
I pulled the K-frame, arms & T-bars out of a 360/4spd. Duster, I had to beat down the T-bar arm w/a drilling hammer,....the engine & trans were already gone so....
Also, even tho' once set, the pivot pin for the LCA doesn't turn...You must set the front height before cranking it down...otherwise it will jack the car, & probably ruin the bushing, which is torselastic but so thin it doesn't tolerate that much twist. Peace!!!