What Brett said is true, even if he was less than diplomatic about it.
There is a guy on here from back in Ontario, Rob C I believe. He did it, the car looked good, but again, I really don't see the point. If you want a 92, get a 92. Not like they are super expensive or hard to find. And if you get an early 92 you have arguably the best model ever made. 6bolt, big cams, 4bolt rear end. The big brakes are easy to put on.
The 90-91 have better drag coefficients, in my opinion anyways look a bit more agressive and less "belly button" Not that the 92-94 are bad looking, not at all, but just a bit more watered down.
Before you do it you might want to get ahold of someone who really did it, because there may be a snag. The sheet metal is slightly different around the headlight area. Just park two of them beside each other and look closely.