Poorboy makes a good point.

When I buy vehicles like the OP's I replace the rubber fuel lines as a matter of course with new fuel injection rated hose. Costs more but I think it's worth it. NOt to mention brakes, ignition, etc.

For all we know there are chunks of crud in the tank from all those years sitting and it's getting sucked up to the pick up, cutting off the gas flow then floating away when it stalls out and dies.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.