I called air lift and they said they have a bag that is 3" in dia. this would do what you want ,,you have to remove the springs to install them they will not squeeze between the spring gap to install as in the instruction. same size for front and rear the rear is spring is tighter(smaller in dia. jim
the stock springs are front 3.25 the rear 2.85dia so you need a 3" air lift bag for the front 3" and that is the smallest they make so you would have to push it into the rear springs. it will work,,, mount you filler valve or line, if you want them tied together.

http://static.summitracing.com/globa...60844_sn_m.jpg