Best way to clean the gas tank and main fuel line?

Here's the sending unit I pulled out of the tank. This doesn't look right, isn't there supposed to be a strainer on there? And what about the compression fitting attachment? Whoever worked on this car years ago was a big fan of compression fittings, I took the pump to carb fuel line out completely because it not only had compression fittings with barely perceptible ridges holding the fuel filter rubber hose pieces on, but there were also 3 layers of insulation on the fuel line. A plastic cover, fiberglass insulation, and finally aluminum foil!

I took the gas tank to a local car wash, and blasted it out through the filler and sending unit holes for a good 10 minutes. I got most of the old gas smell out of it, but there's still a pretty good layer of blackness on the bottom of the tank, so as others have said, probably not worth trying to clean. A new Year One tank is $120, so I'm about to press the order button for a tank sending unit and filler tube grommet, all in one shot. $220 and the problems go away, except for unknown sending unit accuracy. Then it is on to the main under body fuel line / vent line!

Tank sender 1.jpg

Tank sender 2.jpg