I bought the universal V8 wet kit 05131NOS. I also bought a fuel pressure safety switch, rpm window switch, purge valve, bottle heater, bottle blanket, spare 10# bottle, pressure relief valves for each bottle, blow down tube and a bottle pressure gauge.
It took me and a freind one weekend to install the kit and then about 3 months to get all the kinks worked out of my system. Biggest problems were with the rpm on/off window switch and the fuel pressure safety switch. Apten performance tuned my car on the dyno to insure proper air/fuel mixtures and burned a flip chip that has my standard tune on one side and the nitrous tune on the other. The big difference on the nitrous side is 5 degrees less timing over 3000 rpms. This can also be done by pulling your octane plug if the chip is burned accordingly.
I would not suggest using the nitrous at levels higher than 50 or 60 HP until you have upgraded your fuel system and strengthened the bottom end. If your looking for a kit to be used on a mostly stock SC, the ZEX dry kit may be your best option.
I would suggest reading Wayne Ing's article on nitrous. It can be found on the SCCoO website.
David