I NEED HELP!

Okay so I'm about to order my fuel line, trap, etc but needing a little help. I am putting in the K140g turbine but was wondering if I should you 3/16 fuel line for it from the tank back. I know I will have to replace the stopper in the tank that FB sent me due to the copper tubing not being 3/16. I need help figuring this out. pictures would be nice of your fuel setup.

Thanks guys/gals