fuel tank help

[BOATINGMATT]

thanks to everyone here for all you advice on my boat...i have yet another question...I have a wellcraft v20 with a built in fuel tank. I have been told that the tank is no good anymore..i want to put portable tanks topside for the outboard..could i put one just inside the cabin where there is a stepdown with a plywood cover..and maybe a small one in the stern..has anyone ever kept a tank toward the front of the boat vs two in the stern..tks