wanna keep same height

[ss70l78]

Right now I have a 1" coil removal all the way around. My question is , To keep the same stance as now except use drop spindles on the front what size spring to use in the front ? stock or?. Then what size spring to use in the back and finally whether to get lowering shocks or regular. Oh and one other thing do I need to get a shock relocator kit? Thanks for any help. I am running 18" wheels on a 72 sw.