To nitrous or not?

I understand about the forged internals and nitrous. I know you can run 100-150 on stock internals. I was just wondering on the block aspect if I was to hit it with 200 shot. Some say the blocks are only good to 500HP others say 600. If I'm at say 350HP on motor and hit it with 150-200 thatll put me right there at that said point of block failure. I know with nitrous it hits harder then say a boosted setup. Or am I just reading into it too much and over thinking things?
Couple things: You are probably closer to 400-430hp from what you described NA. I know the block will take more than 500hp, and probably a little more than 600, because my car is around 600hp and still in one piece.

Higher stall would be good so you can spray it out of the hole...if that doesn't matter to you then try it as is. I would start small and work your way up on the tune (spray 100-150 and check plugs for signs of detonation). It is good that you gapped your rings for nitrous use...technically it is not required at or below 150hp shots, but I would rather be safe than have the rings butt together, break, and destroy an otherwise healthy engine. A little extra gap won't hurt everyday use.