Firestone Airbag Part Number for 78 Series

Can't help with airbag numbers Rod, but I do know that fitting airbags to leaf sprung (as well as some coil sprung) vehicles & then overloading quite often results in a bent chassis.

Don't fool yourself into thinking that it doesn't happen, I've personally see just about every type of 4wd come through with airbags & bent chassis.

Some have been repairable, others have been write offs.

Much better to upgrade the rear leafs to a good heavy duty arter market set.

I currently have 600kg springs on the rear of mine & will be upgrading to 800kg springs in a month or so.