fuel tank

I know this has been ask before. My 65 Barracuda has been sitting for awhile. I need to clean the gas tank or replace it. I blew it out with compressed air and the car starts and runs but if you let it sit a few weeks you need to blow the trash out of the way. It doesn't leak and looks to be in good shape. Should I buy new gaskets and clean it or replace it.
What do you guys think?