My 1938 Chevy 1/2 ton is now somewhat driveable. One issue I've noticed is that I think it's starving if I need to accelerate for more than about 20 sec.

I'm suspicious of the fuel line from the tank to the pump. What's on the truck is copper plumbing flex line (with a new "correct" rubber hose actually connecting the copper tube to the tank). This copper tube is connected with standard hardware-store compression fittings at both ends, but the ID of this copper seems awfully small. Engine is a 216, and the fuel pump is apparently one of those with the built in vacuum pump.

What's supposed to be there between the tank and the pump ? Is this the likely culprit for a starve problem ?

Thanks !

Alex Meade