Fueling & Injection - Am I going to make things worse by going too big?

When I get the car finished I will be around the 400rwhp mark. I am concerned that the SVO 30's may be pushing it so I have been planning on forking the extra money out to get the SVO 36's. However I have come across some SVO 42's for the same price so I am wondering if going a little overkill is going to hurt me? I have searched and have seen some bad about going to big but I dont know what is too big for my particular setup. In the near future I will be spraying a 150 shot but it will be wet. I will also upgrade to a larger Walbro fuel pump at that time. And yes the car will be dyno tuned when it is finished here in a few weeks.

42s would not hurt you one bit. i'm running them. 42s are not too big

I went from Racetronix 30somthings to SVO42's. Took about an extra week to sort the small pulse issues.