what mechanical fuel pump are you running

12many said

I have this one - CARTER M6270 This is the same as the High Output 80 gph @ 7.5 psi as offered by Mopar Performance (P4007040)

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That is also the pump I have been using for a long time.
The 1/4 NPT can use an adapter. Search Summit under fittings. 1/4 - 3/8 or a AN 6 if your going the AN route. I used it to connect to the fuel line by Russell for the edelbrock carb.