Losing fuel pressure on new setup

It sucked the bowls dry and died the first time. Then it stalled and was dripping out a booster so im thinking sticky needle and seat in my 750 carb. Ill be swapping out the gauge and driving it again changing nothing else to see if thats the problem. My best guess at this point is a combination of a bad gauge and a needle and seat acting up at the same time. Ill try some more stuff and report back. I think im getting there finally, thanks for all the help so far!