I don't see any reason you can hit that thing with a 50 shot. Thats nothing. People are turboing those cars and making more that 50 HP over stock. As long as you set up the kit properly with a good pump and enough fuel jet, you'll be ok. I would venture that 75 or 100 shot would be fine. Back the timing off about 5-7 degrees and go for it. If the plugs look ok, bump the timing back up a bit. Blah blah blah. Standard Nitrous tuning stuff.