If you have a PnP around ya, the mk2 gassers had a in-tank pump that works great. It's low pressure like around 4-5 psi and gets up good.
They use the low pressure pump to feed the high pressure pump mounted where our water separators are.
53willys just finished a gasser conversion and left his in-tank pump in place.
We discovered when we did the first start up that you cant suck fuel though that pump, not even a little. It has to be running to get fuel through it.