I really liked the 90-91 Talon rear, but the 92-94 also looks great. I did the Talon rear on my GSX and left the rear spoiler. It was unique til Gates copied my idea.
With the harnesses being that different, I'd swap in the 92+ taillight relay, then mark down which bulb lights and mark the corresponding wiring harness accordingly. That way you'll know what bulb you have to add and how to wire that. Hopefully you don't have to run wires all the way up to the front harness.
Good luck.
Steve