Yes I believe Bobby's is stock. With enough air your cp3 will push you to the limits of your stock motor depending how healthy it is. Dual pumps will create carnage if you aren't smart with your right foot.
500hp should be easy on a stock LB7 pump, injectors and turbo, depending on your tuning. Been there. You wont have any problems.
Id try to stay below 550hp on an LB7, though.