Originally posted by XonedReality
The only way to get 92-93 tail-lights on a 90-91 is to do a trunk swap. By taking the trunk lid of a 92-93 and replacing it with the 90-91 you will then be able to do the tail lights. but for now you'll have to stick with amber/white on top and red on bottom.
this same technique goes for the '98-2K & '01-02 models, the outside lites fit fine but it's the lites on the trunk that don't fit.