Does this come with fuel line fittings and hose?

Tank and sender only. You'll need to source fuel line, fittings, and hose rated for your fuel system — braided stainless or equivalent, depending on your pump pressure.

Will the level sender work with my existing fuel gauge?

Sender unit is included, but compatibility depends on your gauge's resistance range. Verify your gauge specs before wiring — different fuel sending units operate at different ohm values.

What mounting method should I use?

Mounting method not specified — you'll need to assess your installation location and use appropriate brackets, straps, or cradles rated for fuel tank weight and vibration. Secure mounting is critical for safety.