Hi Steve,
Core RC black springs front and rear, not sure of the poundage but something like 4.0 front and 2.6 rear.
Core RC shock oil 450 front and 400 rear with rear piston holes drilled out to 1.6mm (I have a drill bit that size if you would like to use it).
I used this set up in my KF with saddle packs, worked for me
I used to run emulsion shocks but I'm not sure that's the way forward as they would leak more than when built with the bladder in and set for minimum rebound.