how tall is your fuel tank 1) where the original pump mounts 2) where that dome is minus the dome.
The impala pump shown uses the same gasket and lock ring as a 2010 camaro. The filter is internal - no need for a second filter. The regulator has that little port on it so it is 58psi. it is the same regulator that is used on early ls engines etc. the port is for manifold referenced fuel pressure. They used the same regulator on the 99-02 ls fuel pump without the vacuum signal and they modified the tune to increase/decrease injector pulse width in conjunction with the manifold vacuum sensor reading. These are all non pwm pumps. The regulator is on the pressure side so there is only one fuel line - the return is internal.
If you are running a vented gas tank you can eliminate that green thing which is for the evap system.
later pumps use pwm and a fuel pressure sensor to regulate fuel pressure. they also have a regulator set at 80 psi so that when the engine is shut off and the pump continues to spin the lines etc. aren't damaged.