Fuel sending unit

I've got 2 issues I need some advice with.

1. I have a 67 barracuda. Fuel sending unit is bad and needs to be replaced. The replacement units look like they have a fuel return line on them for 1967. Mine doesn't look like it has a return.... so Im at a loss on what I need to buy to make this work.

2. When I go to turn the engine off and I turn the key in the ignition to the off position the starter briefly engages for a split second and I hear it grind on the flywheel for just a second. How do I get it to stop doing that?

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