Slamming a '78 2wd Jimmy???

[schoolfire]

I bought the truck that I wanted as child a few years ago. 1978 2wd fully loaded GMC Jimmy. It was already somewhat lowered but... when I inspected it a few years ago I found out that the springs in the front were cut and I dont know how the back was lowered. What I would love to do is drop it even more with the ability to raise the back up and down with airbags. I dont know where to even begin on that ordeal. Anyone know the rarity of a 2wd Jimmy???