New tank, Clean tank, or Fuel Cell?

Thanks for the info guys. At this point, by the appearance of the outside of the tank and the color of the sludge coming out of it, I am probably going to order a new tank. And while I am at it replacing the hardware too. I have been battling a stutter issue too and replacing all of the rusted relays, regulators and wires. I'm now thinking bad gas and filters instead of ignition. Just luck that I notice this AFTER filling up the entire tank on my weekend driver lol. Maybe I should park it out by the bus station with a sign that says "Siphon me!"