I almost did the same thing. I had a 99 Cobra vert, then bought my MystiChrome vert, and was planing on swapping out the tail lights. I found several articles on how to wire the 99 lights to the 04, but no articles on how to wire the 04 lights to the 99.:shrug:
So, I just left the stock tail lights on the 99 and sold it...:bash: