I have installed new fuel pump, fuel lines, and rebuilt the carb in my 1948 2ton. I have the tank out and removed the sending unit. Pretty cool, the float is two large corks. Anyhow, I looked in the tank and there isn't any rust that I can see, but there is some yellowed stained, gas vanish. Could I use carb cleaner, slosh it around, then rinse with a little fresh gas?

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1948 Chevy 2-Ton