I was looking into buying some larger pumps for a car I'm getting soon

Edelbrock High Performance in-take Fuel Pumps
For 1985-92 fuel-injected GM Vehicles, non-TBI

Do I need to buy a new manifold? Also if anyone's used, or heard about these please review

Also I am relatively new to all of this, so sorry of I've said anything stupid

 

You will not get any benefit at all from replacing the fuel pump unless your car's fuel demands exceed what the factory pump can deliver.

Also, your manifold has absolutely nothing at all to do with the fuel pump. Your fuel pump just pumps fuel from the gas tank to the injectors. Your intake manifold simply passes air into the heads.

 

I figured I'd need more air to compensate more fuel
I'm making a 400-500 rwhp monster, I figured I'd need to add bigger fuel pumps :XXXXXXXXXXXX