Replacement Fuel Tanks

With the EFI tank kits from Tanks Inc, are fittings with braided lines used, or?

I didn't know if the connections used threads or a barb fitting

Also, I see that there are pump options......Holley Sniper and a Walbro.

Holley Sniper EFI 255 LPH Fuel pump

Walbro pumps are either 190 LPH or 255 KPH

Which is better and why?
You supply the fittings for the pump so you can use whatever you want to work with. The vent is a barbed fitting.
I use push-lock fuel line for mine but I was switching to EFI so I needed to go larger on the fuel line and add a return line. If you are going to use the factory metal line you'll have to figure how to connect the short distance to the new pump.
Pump wise, they are rated on horsepower so you'll have to figure that out. If you're going to up the power in the future I'd go with the 255 lph unless you'll be pushing the 600 hp mark, then even a bigger pump.
I'm pretty sure the Holley pump is the same 255 lph pump and tank, just packaged for Holley.