I have a Holley elecric fuel pump from another project and don't need it for the other project anymore, so I thought I'd hook it up as a backup. DO I have to bypass the mechanical one? If I activate the electric one, will it pump gas THROUGH the mechanical one? I know the electric one will not allow gas to go through it if it is off. Anyone know? It would be so much easier if it does do this, as I want to put the fuel pump by the tank and don't want to have to run an extra line all the way up to the carb.