Not to turn this into a WS6 thread but....
I used to think the WS6 steering box had 2.5 turns lock to lock....wrong. It has 3 just like the non WS6 box.
I used to think the WS6 steering box had its own part number....if it does, I can't figure it out.
But, if you don't have the build sheet and don't want to pay for the PHS documents.....pull the cover off your steering gear. If the three teeth are the same size, you've got the constant ratio WS6 steering box and probably a WS6 car. If the middle tooth is wider than the ones on either side, you've got a variable ratio box which isn't a WS6 box.
Still it doesn't mean you've got the WS6 factory option...but with the wheels, the steering box and the rear anti sway bar....I'd bet it's WS6.