1970 Duster Fuel System Upgrade/Updates

My Duster was a 340 factory car, now with a 440

I removed the stock mechanical pump and installed an Edelbrock # 1723 Performer RPM Street Fuel mechanical pump

This pump uses 3/8" IN / 3/8" OUT fittings and is rated at 110 GPH

The tank looks old/factory so I plan on dropping it and installing a new tank

I also believe the fuel lines are stock, so they look to be 5/16"

When dropping the tank, would it also be a good idea to replace the lines from the tank to the pump, with 3/8" lines?

What about the stock fuel sending unit? Is there difference ones/sizes? I was hoping there was a 5/16" and 3/8" size option?