Is Nitrous safe for my set up??

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I really want to try out the spray on my 91 GT but not if it is going to destroy my current set up. I have a 10.5 to 1 compression 331 with 24 lb injectors and a 155 lph fuel pump. The anlayzer tells me I make 334 average horsepower so I type in 420 avg.(guessing for a 100 shot) and the analyzer tells me I'm under injected and my fuel pump is almost not large enough. My builder gave the rings a little extra gap because he knew I might like to try the spray. Does this mean i should forget the NOS or should I be OK??? I was thinking maybe a ZEX wet or dry system but not if it will kill the engine. Help!!!