Dual Feed Fuel Line Setup

Well the Holley 34-150 line does not fit

It lines up about perfectly with the carb fittings, but will not screw in to the carb

The fittings on the lines are too small to thread into the carb ports

Do I just need to buy two fuel bowl fittings?

The Holley lines uses 5/8 x 18 inverted flare inlet and outlets.........so I assume the current fuel bowl fittings in my carb are 3/8?

Any ideas or suggestions?