To be consistent it seems that the UCA, LCA, and TBs would be white. The K-frame would be gloss or semi-flat black. Questions to consider: Where does it end? Do you paint the steering linkage, LBJ, and backing plates white? some other color? at all?
If it were me, I would not paint the springs, especially if I plan to keep the car a while. The springs flex along their length which can crack the paint in one place and allow moisture (and rust) to collect in another.