To nitrous or not?

It'll be fine from a durability standpoint, but what about the camshaft? Generally, nitrous isn't an add on. You build the engine FOR nitrous, not simply bolt it on. Sure, you CAN but it's never as efficient. Also, what about the converter? Is it a nitrous converter? They are very specific. They also need an anti ballooning plate even with low levels.
I do in fact have the HD converter with anti ballooning plates. When I had my 318 in it I was planning ahead to run nitrous on that engine. Also as far as cam goes, I talked to racer brown on that issue. Like you said any cam is fine it might not be as efficient but a any cam will work with nitrous. You may have your car setup for "200hp shot" but with your particular cam you may only be getting a true "150".