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

Mikk said

Thanks for the tips, I had just had the front suspension apart, replaced all the ball joints and upper control arm bushings. The lower arm swung all the way down to the shock's full extension at the time. I reassembled it but didn't tighten the upper a-arm bolts until the car was back on wheels.

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lower control arm pivots nuts should also be loose until the vehicle weight is on the suspension. once those are tight, with the bushing being a press fit in the A arm and to the pivot, with the rubber bonded to both, it's the rubber flexing that allows it to rotate. if you tighten that pivot when the vehicle is in the air and the suspension is in full rebound, the rubber is acting as a torsion spring holding it up, and that lower control arm bushing will fail prematurely.