Uhh, do those UCA's look like this?
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Because if they do, they were made by CAP. And that means they can end up looking like this...
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CAP was bought out by QA1. Some of their designs were good (like their tubular LCA's, which are basically the same as QA1 LCA's). But their welding and quality control was dangerously bad. I cracked a weld on my CAP tubular LCA's on my Challenger. No catastrophic failure like the UCA's usually had, but bad regardless.
If you have CAP uca's, you want new UCA's anyway. The second gen SPC's are cool, but for an A-body I'd run the 1st gen ones. I have them on my Duster. Not as spendy and just as adjustable.
As for the camber gain, Steve and TT5.9mag have absolutely nailed it. The only thing I would add is that I wouldn't mess with the ball joint spindle lengths unless I had totally plotted out the suspension geometry on YOUR car. Because how your car is set up will change what you want. Sure, you can get close by looking at a general A-body suspension plot, but changing the upper ball joint height is really a fine tuning thing, so, you'd want it specific to your ride height, the rest of your suspension components etc. I wouldn't change the ball joint spindle height on my car based on Steve's plot, for example.