Oh, didn't see it in your sig.
Also, if I'm not mistaken, there are only two different types of shocks within the Radflo and SAW brands. Each have shocks available for 6" lifted applications, and they each have shocks that are for non-lifted applications, which result in 0-3" lift on 4WD and 0-4" lift on 2WD.
Basically like so:
Radflo 2" C/O's: work on non lifted, leveled, and 4" PRG Package, provide 0-3" lift on 4WD, and 0-4" lift on 2WD
SAW 2": C/O's: work on non lifted, leveled, and 4" PRG Package, provide 0-3" lift on 4WD, and 0-4" lift on 2WD
SAW 2.5" C/O's: work on bracket lifted trucks: PC, FT, CST, Rancho...
DR 2" C/O's: work on non lifted, leveled, and 4" PRG Package, provide 0-3" lift on 4WD, and 0-4" lift on 2WD
DR 2.5" C/O's: no longer available
Soooooo, logic tells me that if you have any of the 2" C/O's, you could for sure use them with the PC kit, especially since you have UCA's, which will allow you to crank the preload up a tad more to the lets say +2" setting and have 2" from the shocks and 6" from the spacer????