[blucar]

A lot of dialog about the electric fuel pump without touching on the main issue.
It is generally agreed that an electric fuel pump should be installed as close to the fuel tank as possible. Electric pumps push better they. they pull.
It is recommended to install a pressure switch in the power source that is controlled by engine oil pressure to turn the pump off in the event of an accident
.AIRTEX makes a good 6v pump. I have used many electric pumps in my vintage cars, either as a primary system of just to starting after the vehicle has been sitting for many days. An added feature if the pump is close to the tank it is not effected by engine temp, therefore it can be used to break a vapor lock.
Looking at your picture leads me to believe that you are over thinking the whole situation.