UCA decisions

Nice car!
As far as the squeaking goes, did you grease the poly bushings during assembly? (White lithium grease, if I recall correctly- a packet should have been included with the kit, IIRC).
Did you assemble things (control arms) loosely, set it down on the ground so the suspension was loaded, and then tighten up the nuts at ride height? Failure to do so can cause binding/squeeks...
Failure to achieve at least factory alignment specs is usually due to either damage or alignment tech knowledge/ability. The Moog bushings are a good idea to be able to achieve specs for modern radial tires- just make sure they're installed correctly for your purpose (NOT according to their enclosed directions!)
Moog UCA bushing installation | For A Bodies Only Mopar Forum
Following the SKOSH chart - your experiences? | For A Bodies Only Mopar Forum