Oh yeah, for my "kiddie coffin", my friend made it extra deep just so you can get a good look at what he did. I didn't have anything special, I just wanted a nice clean install. The bracket that is behind the axle, has all 4 of my valves on it. So basically, everything is hidden under the bed, except for the fuel cell, when I have mounted behind the cab in the bed. The hole in the coffin, well its got a removable top, so if I have problems and need to change a shock/bag/valve, then I can without taking the bed off.
My kit is straight old school. I got it from Alter-Images when they was still around, but I got my kit back in '99. It is: 2x2500lb & 2x2600lb bags, 4x Beltech Shocks, Parallel 4 link, 1x3 gallon tank. I have a Viair 450 compressor, all 3/8" lines and 4x Pro Comp 3/8 valves. I also have 2x Dual Needle air gauges in the A-pillar for each bag, and also I have an air gauge for the air tank mounted in a steering column cover made from Autometer for a mustang. Its got alot of work in it. I wanna see that M2 suspension up front!!!!