I don't think alot of those that got the complete kit used the rear. It was too much of a pain in the arse. It's not a complete bolt-on bumper. I think they half-azzed it when it was made...
If you want a custom car & have someone that can do exceptional body work, then get it. This is not something that you can take from the box & bolt right on. It'll take a bit of work to make it correct.