Carter 1 barrel carb leak in 64 valiant any ideas??

Dirty, dirty gas+ dirty dirty carb. Drained tank and flushed it out, cleaned fuel lines with air. Years of junk in there. Ran off a jerry can after cleaning carb and new fuel pump and filter, no leaks...planning to remove tank and run a fuel cell in trunk anyway. Replaced my tank in my 72 a couple of years ago with new fuel lines and fuel pump. Amazing what you find in a old steel gas tank after almost 40 years.