Roll cage kits?

I have tons of experience with circle track chassis, but have never put a cage in a production vehicle before. I know the more popular the car, the more "finished" the kit probably is. I'm sure a Mustang/Camaro cage is probably dead nuts. How much monkeying is involved with a Dart cage specifically? I live pretty close to S&W and always prefer to support local businesses. If I'm going to have to cut and renotch every tube then I see no point in buying a kit.