Get in any hot rod magazine and look up MSD. They make ALL the ignition systems you need. You can even retard the ignition timing (absolutely mandantory) when you hit the nitrous. Also buy the book, at any good book store, on nitrous systems. It's written by David Vizard. He's a friend of mine and knows everything about nitrous systems. I won't even install/tune a system unless the car owner reads the book.

Ron