yes i know that servo richening of the engine to go with a nitrous system like this is completely unexplored territory , the opposite of what tuning an engine normally is... all i can think of is to take your truck to a dyno and run lots of tests and simply judge by the increase in power

a new engine is the normal way of getting more power, but normal = boring for some people... these people usually have money to spend to try out new things
in the end its probably gonna be 200 bucks for this nitrous system and as many replacement engines as neccesary to trial and error on