Fuel requirements

I have purchased much of the blower extras. I have a question.
I currently have in the car a 2 year old 190lph pump with low miles on it. Would it be enough to add just a Aeromotive 1000hp external pump?? Would the external run my intank dry??? or is the better idea to also anti up for a 255 in tank.
Your input is greatly appreciated.
I am expecting 425+rwhp with s-trim at 10lbs of boost.
42lb injectors, afpr otherwise stock fuel system.

When I was making 425 I had a 255 intank and a t rex with 42lb injectors. It worked great for my car. I think its always better to have a little bit bigger fuel system than you really need.

I agree, fuel saves motors.