I'm not sure how the pick up tube is on your car, but on my 53 Cavalier is it right on the bottom of the tank, even if there was a pin hole the fuel would have to be very very very low.
Maybe there is an inline filter back by the tank underneath the car? (Not factory.) Or a filter at the carb, if your car has a filter there.
I don't think it's a serious issue, probably something caused by the car sitting for too long. Gotta drive our cars!
Let us know what you find!
BTW, most of us are kind, you'll quickly figure out who the unkind ones are, so I won't list their names!
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