Fuel Line Size At Tank, Gonna pull it today Options

[Allan]

I've decided that since I'm getting the car painted I might as well pull the tank and fresh air box and do it right. I do have some fuel in the tank and just need something to plug the fittings on the bottom so I don't end up with a lake of fire in the garage.

I'm going to replace the lines from the tank to the ones that run through the tunnel but can't remember which size.

I seem to remember either 12mm or 5/16.

I am running carbs so the high pressure FI lines aren't needed.

[Cap'n Krusty]

5/16" is too big. 7mm is correct. The larger of the 2 lines is 9mm, and is the supply line. The smaller is 7mm and is the return. Neither is a "pressure " line in a 1974 chassis, as the pump was originally mounted in the rear. While FI hose is always desirable, even more desirable is the correct diameter! Were I choosing to eliminate one line, I would choose the smaller one, especially since the larger one has a debris screen ("sock") installed in the tank. So what you need is 9mm hose. Odds are the 8mm won't fit. The Cap'n