OK, I had to stop on the last post, now I can pick it up again. By now you have read enough and looked at enough pics to get a concept of what the front needs.
You will want to start with the basics up front though. If you don't already have dropped spindles, you will need them. Of course now is the time to decide about converting to 5 lug if you haven't already. Check out
Classic Performance
The rear on coils spring trucks is something a bit different for me, but I'll try to explain. The bags will go on mounting plates that mount where your coil springs are now. You will need an adjustable panhard rod to get the rear end back in alignment. I'll let the 67-72 guys tell you more about that.
You need valves to control the air. You can get by with 4 valves by hooking the front corners together and the rear corners together. I don't recommened it though. It "will" work, but you "will" get more body roll as the air transfer from side to side when you go around a corner.
I suggest you isolate each corner by using two valves per corner. Air Ride Tech make valve blocks that will do this rather than individual valves.
You will need at least one air tank for storage. A 3 gallon tank is about the smallest you want to use. I have found that two 5 gallon tanks works best, so your compressor doesn't have to cycle every time you air up.
You need at least one gauge with dual needle for a 4 valve system, and two gauges for a 8 valve system. This lets you know how much pressure you have, and tells you where you are at in ride height.
You also need switches to control the valves. The common switch used are rocker switches, so you only need four to control eight valves.
OK, that covers the basics. Try to get an understanding of all this, and we can talk about compressors next time....
