The headlights and mounting brackets are exactly the same size for your car and a '99. The difference is the side marker lights. You can put a '99 front end on with your existing lights and it will match up with your fenders so you won't have to change the corners either. I looked into this myself and have the parts paperwork. I was going to scan it for you but I can't find it at the moment.
You can go to http://www.parts.com and look up the parts for both years. Next to the part description and numbers you can open up a window that shows pics you can compare. The headlight and other part numbers are the same with only the years different.
You can go to http://www.parts.com and look up the parts for both years. Next to the part description and numbers you can open up a window that shows pics you can compare. The headlight and other part numbers are the same with only the years different.