Ok, i know they will physically fit in place of the '85s but the holes in the taillight panel are bigger so the seal to the body is harder. The rubber seal on the Newer taillights won't cover the huge holes left from the older ones. As for the led wiring I am not sure of the changes if any. I wish I had gone for those led's for my '92 but I went cheap and bought the tinted lense euro style lights. Good luck and let us know how they wire up K? Laters!