I’m looking at tightening up the handling on my van. It’s a '79 G30 with a camper conversion (weighs around 3350kg 7400lbs).
I doubt if any of the steering arms etc have been changed since it left the factory.
Has anyone any recommendations for what to replace?
I’m thinking of getting some new shocks too what would be good ones for this weight van? I have Monroe shocks on it at the moment and have airbags in the front springs.

When I did mine, I just went through and replaced every "wear item" that was available. Ball joints, tie rods, control arm bushings, pitman arm, idler arm, wheel bearings, coil springs, shocks, etc.. the works. You'll get a better idea of what it needs once you take it apart, but at this point if all of the parts are truly close to 40 years old, it's a good idea to replace them even of they seem ok.. Especially the rubber pieces.

As for shocks, I went with Bilsteins and havent looked back. They are noticeably better than most of the others I've found. Keep the airbags though for extra load capacity.

Cheers tuner,

Do you have a sway bar?

Yep front and rear ... I fitted a Helwig on the rear a while back.