It is speed limited for safety reasons squiz - the tailshaft is too long and can flex at high speed and possibly break. The Pursuit 250 utes had a specially made 2-piece tailshaft and as far as I know aren't speed limited. A further note - not trying to be Mr Goody Two Shoes here but why would you (and where?) be needing to drive at more than 180km/h?
You know, somebody actually complimented me on my driving today. They left a little note on the windscreen. It said, 'Parking Fine.'So that was nice.