Hi all!

Have a 6x6 GU Wagon, body cut to dual cab ute and extra axle by 6x6 Australia. Running on airbags on the rear axles. My question is related to the ride which is quite rough compared to other coil wagons of same vintage I have driven. Where would I start with the suspension, is it worth looking at upgrades or is the rough ride simply the price for the 6x6's load capacity?