Not that you'd ever do it, but the 3-spoke alloy wheels from the '96 *BARELY* fit on the '03. I'm not sure I could have fit a credit card in between the back of the spokes and the surface of the caliper on the fronts. The ZR-2 alloys from the '03 fit great on the '96, and looked freakin' awesome, by the way.
Also, as is well-known, the spring-spacers are identical.
Um....that's all I've got.. Headlight bulbs probly interchange..