Just thinking out loud here......I was looking at an Air Ride catalog last night. They have a fairly small sleeve style airbag/shock combo they recommend for the rear of trucks like mine (light- '37 ford). They also say it could be used on a leaf spring setup.....basically pull some leaves to lower/soften the vehicle and use the airbags for ride height and load carrying.
I'm wondering why you couldn't do the same for the front? Drop the front to where you want it, and fab mounts for this smaller airbag/shock combo basically in place of the regular shock and air up for increased ride height when needed.
My front end currently has a 4" drop axle. If I do a reverse eye Posie spring, it'll drop it another 2"....right where I want it. (but too low for my dirt road going home)
I already have a Firestone air pump....if the airbag/shocks will physically fit, it should work.....no?

http://img.villagephotos.com/p/2003-...shockw7000.jpg