I can see that Emils system is a better designed fuel system than the Morgan one and closer to what S&S recomend, it has a fuel filter before the injectors for starters. Not sure that the work to get the fuel to the injectors will actually improve things, other than being better engineered. The fuel pressure supplied with the standard system should result in a fairly even supply to the injectors but even if it did vary by a few psi the Lambda sensors would alter the injection pulse for each cylinder with the closed loop system to get the correct fuel air ratio for each cylinder. At wide open throttle the system reverts to the basic fuel map but if this is set up for the standard system it will have any slight variations in delivery pressure factored in with the basic map. Possibly any alteration from standard injector supply of the fuel system should be done with a dyno run for WOT settings?
I do like Emils filter before the injectors and the pressure regulator with a gauge, better for checking the fuel is being delivered to the injectors at the correct pressure and clean.