Unless you use the newer harness, or add a 2nd blub for the turn signals it is pretty much plug in play. The side marker connector doesnt fit al lthe way in, but will fit and stay snug in its place. It still shines bright. Hood is the same newer and older, you might need to adjust the springs under hood for a nicer fit, but thats up to you. As said above, the fenders are probably the hardest part, but not really hard, just time consuming. I wont be running fender flares as the ones I have need to be sanded down and painted. Bumper is up to you. I would say the newer bumper is a little better depending on the tires you are running, as it is not as wide. But thats minor stuff.
I wish I could find a black grille insert, and headlights bezel's for mine, but thats not important right now.