Replacing gas tank in my '65 Dart...
New tank grommets are ~$15. Consider a sender w/ a 3/8" outlet and a return stub if you ever think of running EFI ($45 on ebay). Good too even w/ a carb to return gas to avoid vapor lock. I see gas tanks for ~$120 on ebay. Make sure you buy "fuel injection" hose, not the cheaper "carburetor hose". That later often doesn't stand up to the ethanol in gas today (read posts).