Origin fuel tank and line routing

[Markus_E]

I got a little problem.
I drive an 72 c10 with the origin fuel tank behind the seats.
The connection for the fuel pump is a bung on the bottom of the tank in the middle. The return line is connect to sending unit. The eec outlets at the neck connect to each other.

And when the fuel is less a quater then i have problems with the fuel pressure. When i drive around corners or step to the metal i have a large loss of power.

I drive it as a daily and it would be cool if i had the reach of the whole tank.