1972 fuel tank venting

Sorry if this has been asked before, can't find related thread to my question.
I puchased a non vented gas tank. The car originally came with a tank, vented thru the charcoal canister, which I has since removed as I am restoring the vehicle. Can I just buy a vented fuel cap to solve my venting issue, or is there more to this I need to know?
1972 Duster Thanks......