Either (2) 3 gallon tanks or (1) 6 gallon tank
I'm no expert, but I do have some suggestions. Since you are considering two tanks, I would go with two 5 gallon tanks.
I suggest this, because I think anything less and you won't have enough volume to raise your truck more than once without your system having to cycle.
York Engine Compressor
The York compressor was used as a were factory a/c compressor on cars for years. It's an excellent unit, but not very pretty under the hood.
They will pump more pressure in your tanks faster than just about any 12 volt compressor will. The only down side I know of is the engine has to be running for them to work.
3/8 fittings
3/8" fittings (and line) are fine if you just want your system to flow well, and they are reasonable in price. If you want to clown a little, then a 1/2" system will move air much faster.
Digital air guage
You can use two dual needle analog gauges just as well. The digital gauge is nice because they are easy to read. They also allow you to fine tune your air pressure with a bit more accuracy.
You are going to need 2 or 4 switches, wiring harness, or wire to make one. You will need a bunch of line clamps to secure the air line, and some rubber grommets to put in holes where the air line passes through metal.
I'm sure I have left a couple of things out, but this will get you started. Go to
Air Ride Technology and look at their kits. Even if you don't buy anything from them, you will learn a lot looking at the site....
