[sunman]

This is a Classic Roadsters tank and filler neck. TankCraft Corporation Darien, Wisconsin. 5 hole sender unit 9” deep, 0-90 ohms. The LeMans cap has a fuel drainback line too. Plugged maybe? Fuel, emissions and return line fitting are in the sender unit. If you don’t have one good time to add it.

Edit: return line fitting is added to sender unit