The Camaro Club (UK)

If you've got more aggressive geometry,such as lots of positive camber etc.. (like me) it'll react badly to rutted roads and truck grooves on motorways.. but it'll turn in nicely

Chances are, as Sportsroof says, it's just worn steering and suspension components.

The amount of times I've seen cars at shows and meets, where the outside is all shiny and nice, but look underneath and they're still running the worn out 30 - 40 year old bushings.
I'd check the bushes worn ball joints, worn steering track ends, plus on 2nd gens the steering idler arm and pitman arm do wear fairly quickly in my experience.
It's possible the steering box has some play but not as excessive as you describe, only other moving part is the rag joint in the steering column that connects the box to the steering shaft (hidden in a plastic shroud), but it's usually not that bad, and would give that much play.

You can buy these steering/suspension bits as a front end service kit from some suppliers too.

Just to clarify then: Assuming all joints/bushes are good, there can still be a problem, here's how.
Steering box has a 'tight spot' in the middle of it's sweep, which should correspond with the steering wheel central AND front wheels pointing dead ahead. All happy then, yes?
Unfortunately parts replacement can mean the wheel ends up off centre so someone alters this to make it look right. Now you are driving straight but are away from the tight spot so there is play, and when you try to make a small correction, there may be slight resistance (the tight spot) which you have to then fight with as it's usually right where you don't want it to be so you end up sawing at the wheel try to go straight! Maybe a bit exaggerated to illustrate the problem but you get the idea. Plus the steering boxes can usually be adjusted up to eliminate play.
FWIW, mine has an original 44 year old box and with it all set up nicely, it steers fine with one finger and thumb at 130+.
Cheers, Martin

Maybe all that's needed is to adjust the Worm Bearing Preload and Sector Lash.

http://dev.lv2014.integr8cms.net/index. ... ector-lash

My 4th gen SS is the worst car I have driven as far as following the camber or lorry tracks is concerned, fat tyres and stiff suspension are the cause and it actually mentions that this is to be expected in the cars handbook

Maybe your steering box is not adjusted like the instructions I posted above.
A Chiltern manual for your car will show you how.
If your box is the same as a third gen I could scan the pages.

That's very kind of you, appreciated I don't know if the box is the same or not as a 3rd generation, I don't suppose you've any idea of how I might find out??

2nd and 3rd gen boxes are pretty much the same, in fact a good second gen upgrade is a later IROC Camaro, or Firebird GTA box as they're quicker ratio, but pre 78' cars have different size power steering hoses, post 78' 'should' fit straight on...

From what you're describing, I'd check every other steering/suspension component first personally.

What year is the is the part I should be looking for with regards to Iroc Z or GTA box