I can point you in the right direction
I also have a s-10 pickup that Ive been building for years and know a lot about this subject. Suicidedoors.com is the cheapest place to get airbag stuff. All you will need is a 3gallon tank for this situation. The air zeniths are good but overkill and plus they pull a huge load and need a big relay and wire and all that fun stuff. The Viar 420 is perfect, I use them right now. They even have a wiring diagram under the air managment section to show you how to hook it up. Your going to need a pressure switch also, but they are only $20. Stay away from PTC fittings. Only use compression fittings. You can go to home depot and get most of what you need. Dont get larger that 1/4'' line or it will be hard to control the speed. The simplest way to do it is tho uses a in line ball valve between the tank and bags, somewhere thats easy to get to or you can use and electric solenoid valve, which gives you in cab switch control but you have to wire it up. hope this helps, its much easier than it sounds to hook it all up. good luck.