Valve cover breather

So since I’m redoing the intake and carb on my 71 318 I have decided to try to swap out the breather with the hoses on my passenger side valve cover. It has one line that went to the old carb that is no longer needed on the new carb. One line that went to the air filter that I was told would be fine to delete as long as I still put an breather on the valve cover. Lastly it has a line that runs back to my fuel tank. If I have a vented fuel cap could I cap that line at the fuel tank and not need to hook that line back up? If I need to I need to and will just trying to see what I can get rid of.

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