A filter before the pump is a bad option... The mechanical pump is pulling fuel the full length of the line from the tank to the pump, adding the restriction of a filter can cause starvation... Either use the carb inlet filter or eliminate the vapor separator & instead use a fuel filter...
What I've done is substitute a combination fuel filter/vapor separator off a later model Mopar....
It's a regular inexpensive fuel filter that sends vapor back to the tank...
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