On the black metal tube that crosses the engine, where do you have the middle port running? You NEED to do something about the oil control system (i.e. run this tube into a quality catch tank like the Crawford AOS or something similar) or else youll be sucking in lots of oil vapor with the increased boost. Oil vapor can cause detonation which in turn can cause the sales of newborns to increase to funs replacement parts, as LD pointed out.

There is no reason not to run the factory boost control solenoid for this kind of power granted that your tuning equipment (cobb, open source, etc) will support control of it.

If you want the car to be reliable, build it to make 400hp, then run 300hp on the regular.