You're probably right, I myself have no original left,
AN8 fuel lines, Nuke fuelrail, Turbosmart FPR and standalone ecu = MaxxEcu Pro with home built engine wiring harness.

But for me 2pcs of Walbro 450 was to much for this big Turbosmart FPR so that is why I needed so slow down my fuelpumps, So now I controll them with a MaxxEcu PWM unit made for this.