100 horse shot of nos for 440?

I love nitrous. I would recommend you get a air fuel ratio gauge. I was running a 150 shot on a stock bottom end modern hemi. Ran countless bottles through it. And made sure my air ruel ratio was in the mid 11's that was after leaning it out some from a low 10 AFR. I picked up 2 tenths after I leaned it out, but it was still on the rich side for safety. You will need more than a basic kit. You will need a heater, bottle pressure gauge, fuel pressure safety switch, and more things I'm forgetting I'm sure. But those 3 are the minimum you need to add to a kit out of a box.