Anthony Parent

Hi guys!
First of all, i'm not a mechanic. I learn and do all by myself. But my knowledge is limited.

I want to instal a fuel cell on my 91 audi quattro 20V, since my fuel tank is all rotten. I've got the fuel cell, but now i need help on wich parts to choose.
I was wondering what kind of fuel pump i could use. Should i use my original intank pump and install it in my fuel tank?
I was thinking to use an external pump with some kind of fuel mat.
If anyone have any ideas for me, part numbers, etc. It will be appreciate.
I navigated a bit on summit racing web site, but it only show me one type of external fuel pump, wich seems to have only one fuel entry/exit. I have difficulty to understand how this pump could work on my system...
Im waiting for your ideas!
Got the car since 2 years and i on only drove 100 km with it, spitting fuel everywhere. I hope i could get it to run this summer with a little of your help!