I agree with Scott -- There is nothing more aggravating and less fun than to have your engine quit on you in traffic, on a hill, 100 miles from home in the rain because crap in the fuel line got into the carburetor (voice of experience here). As Scott says, once you have crap in the tank, every trip is a game of Russian Roulette.
Don't screw around with the old tank -- just toss it and order a new one from Jim Carter or American Classic for about $200 and the nice UPS driver puts it right on your front step. And then you're done. As in You can cross that one off your list completely. No worries, no hassles driving around here to there and wondering if they actually got it all.
I got the repop tank for my '49 4400 and it was darn near perfect. And I will never worry about crap in my tank.
Regards and welcome to the Bolt!
John