how hard and how much would this run? i recently picked up a 99 extended cab s10 with fbss bags. c notched 18's in the front 20's in the back paint stereo the whole 9 yards. but i want to control each bag and pancake  see saw all that special *** lol. could someone point me in the right direction. or give me some info on here. the truck has 1/2 inch lines and an engine driven compressor. its loud but its quick.  just lead me in the right direction  

I guess I am a little confused. Your topic title is "4 valve to 8 valve and a 10 switch setup" but you say it has fbss???????
If the truck has only 4 valves it would only be (fb) front and back and no side to side
if the truck is(fbss) front, back, side, side you would have 8 valves.

to halp me answer your question fully I need to know the following.
How many valves does your truck have?
Do you have a 10 switch box installed?  

im pickin the truck up this week. it has 4 switches in it but it is a fbss setup. i just want to control each airbag and like i sadi pancake see saw and the others. my friend over in cali does custom bag setups but hes in the military so i cant reach him. i hope what i gave you is enough if not ill look at it when i get it and ill let you know  

oh ok if it already has 8 valves then you just need to get a 10 switch box and hook it up.