You really should think about doing the bolt in AirRide kit on the rear. Yeah, it's more expensive than springs but, way worth the extra cost. It's very easy to install and of course adjustable height is nice. Especially if you ever need to throw a few hundred pounds in the bed. A 5 or 6 inch drop spring in the rear without a C notch isn't going to leave much travel.
I did the rear bag kit on my '65 3/4 ton. It was all very straightforward. Relocate shock mounts and add adjustable panhard. Haven't bagged the front yet, as it's a bit more expensive. It's got a 4" drop though. I modified the control arms.
Until I get the front done, I've just got a schrader valve inside the cab and a battery powered compressor to air up the rear and a little dump valve to air it down. 20psi and my frame is just about on the axle. 38psi is ride height. Doesn't take long at all to get from 20 to 38. With the rear at ride height, the rake is about the same as factory. When parked, the rear sits lower than front. Overall, I got about a 4/6 drop, still have a nice ride and can still fill the bed if I want.
Something to think about.
-David
