No need to spend money on a new sending unit unless you really want to, just drill yours out and put in a bulkhead if that's the route you really want to go.

As Jeremy said soak them, I broke 4 out of the 6 on mine and it's been a headache since.

Maybe someone has there old fuel pressure regulator laying around, I would give you mine but it's with someone else that was having similar issues.

You can also spend a little money and get an adjustable fuel regulator, and throw a gauge on that, especially if you ever plan on upgrading the pump in the future.