Mopar perfmorance fuel pump for my 340

Those ports are both 1/4 NPT threads. Take those adapters out of there and it will look like this:
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Then get a male 1/4 NPT to 5/16 hose barb fitting for the inlet;
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and then get a male 1/4 NPT to female 1/2 20 UNF fitting for the outlet which will allow you to run a 5/16 hardline (flare fittings) from the pump to the carburetor.
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