New here - Thanks for patience I have a shop that has my 425 (2 bbl) carb rebuilt and engine running, but they say the gas tank is bad, not sure where to find a good option (i.e. working/clean original from somewhere? or effective alternative that doesn't need a lot of "filler neck modifications") Thank you for any advice...this Batmobile (1965 Olds Dynamic 88 Convertible) bought from my grandpa has sat in an A frame garage since 1990 Andy

 

If you still have the OE fuel tank I would save it if it's salvageable. Undoubtedly you wouldn't be able to get a fuel tank from a Chevy Impala to easily fit.