I've had a similar problem with my fuel system. Right now I have the fuel tank out, and it's pretty rusty inside. It'll be going to one of the gas tank renew and coating places today probably.
I intend to add one of the inline fuel filters (the type with the glass bowl and paper filters). My question is, where were they originally located? Obviously, before the fuel pump is best, but do you just cut into the fuel line at a convenient place, or is there a certain distance upstream from the pump?