Nitrous Express on a 97 civic ex

Hi, I have a 97 civic ex with AEM CAI, STR throttle body, skunk 2 intake manifold, dc headers, apex cat back exhaust, msd ignition wires, coil, and controller, pulley upgrade, denso iridium plugs, accel fuel injectors, AEM fuel rail, regulator, and filter, with new high flow fuel pump. I was wondering if it would be safe to put a NX sigle nozzle EFI system set to a 75 shot. I would then retard the ignition 4 degrees to prevend detonation. NX says that this system is safe to use on a stock motor so I figure that it will be more than safe with the ignition retard and added fuel. All my internals are stock and NX says that it safe with stock internals. It will be used maybe 5 times a year and only for about 4-5 seconds each time. I am a good racer and have never hit the rev limiter before. I was wondering if anyone knew anything more about this setup or if anyone has some recommendations.

thanks

Nitrous is safe if used right, I did vote no because most be people abuse it. I don't think a dry 75 shot is safe, you'd be better off with a wet system. Or better yet - http://www.amazon.com/exec/obidos/tg/detail/-/1884089623/qid=1070171757/sr=1-1/ref=sr_1_1/104-3711308-7717545?v=glance&s=books

this is a wet shot, the nozzle mixes fuel from a tee in the fuel line with the nitrous and is then injected into the air intake