Ah Trakmotive that's what I ment!
As far as an uca, you do not want an rpg one, they only have a 1" uniball and they are mounted on plane with the inboard pivots.
For the amount of droop you will have with those shocks and without raising the shock bucket up, there are no uppers that will mount to a factory upright that will get you to droop without hitting the springs first.
To max what you have get a upper with a 1.5" outter uniball and one that has the outter joint angled for lift.
Edit: I may have misunderstood, if you are getting a lift spindle, that could definitely help with the uca issues.