[Rufas]

Why not go with the super basic air ride setup that is completely manual in operation. I have air ride on my 70 GMC 2500 that is completely manual. Just two switches, one switch for the front and one switch for the rear. You could also use four switches , one switch to control each wheel. That would give you a lot of flexibility when trying to level your truck.

Your not interested in speed when leveling. So go with a small compressor, about a 3 gallon air tank, a manual valve, a couple of air gauges, and four bags. Bags are dirt cheap, and air compressor is about $100, tank about $50. Just guessing but I think you could do this for about $600. Maybe a little more or even cheaper. You don't need all chrome and iPhone interface. Just keep it simple.

You might consider this as an option. Instead of raising the truck to make it level, you could just as easily lower it. After all you won't be driving it once it's level.