It's a repost?
pontiac xp 758 scorpion
Actually you're right and if I'd realised I wouldn't have moved it up to the Experts.. I've even re-posted it myself before... D'oh!
I said in my initial post that this car has appeared before but I said not as its own puzzle. I was wrong, as searching for "Pontiac Scorpion" did not produce the original puzzle (it still doesn't - I just tried..) but searching for "Pontiac XP-758" does produce the puzzle with which I have now merged mine (again..).