47-55.1 SBC 350 leaking fuel pump line

[NeoJuice]

After doing some digging through some receipt's I found the adapter size is 9/16"-18 that comes straight off the tank.

Problem is on the other end near the fuel pump the braided line has a metal 90 degree bend and seems to reduce down in size. I don't know what size that is.

So I know the fitting I'll need will be 3/8" NPT for the fuel pump side but not sure of the other line size b/c it sure does not look like 9/16"-18 (yellow arrow) or is the fitting 3/8" NPT 6AN that would connect to the yellow arrow?

I know its hard to tell from pictures but I'll have to physically take a look. Then I'm still stuck with the issue of getting the line plugged or draining the tank.