WCA - I've already posted this link on my build thread, but just incase you missed it.
http://www.rodsnsods.co.uk/forum/gar...da-b2200-45080
Whilst it doesn't have air bags, it is an old body on a modern chassis.
However, there are some great details on fitting air bags on this build.
http://www.rodsnsods.co.uk/forum/gar...at-truck-82580
In fact, that forum will have everything you need to know in it.
Good luck, Paul.