Help appreciated

I'm purchasing a fuel tank and lines for my stock 318 1972 Demon... I've seen vent and non vent gas tanks... Which one do I want / need / get..?
Also, not sure on fuel line size, etc.. Any help would be much appreciated.
Thanks,
John
If you stick to stock, the tank "depending on state if origin' could have early evap, tank vent to crankcase etc... like 3 lines. If you want to xnay all that ...just get a regular tank without vent and use a vented gas cap.