To check UCA, you need to inspect rubber bushing at the inside top. Follow from upper ball joint. I had uneven wear on my tire, had a shop diagnose, they showed me where there was very little rubber left. Easier to see when on a lift. Yet, if they're new, well... Lower ball joints can be difficult. I replaced all four shocks with regs, before I knew better, ok. The best way I can describe, it felt as there were a pivot point in the middle of car at highway speeds. Bilstien shocks, many folks put HD's on front, regulars on rear.

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83 SD

84 CD