not getting any fuel

If the hose you replaced at the rear (attached to sender) is cracked or not tight, it could suck air and prevent gas from being pulled out of the tank. In that case, it could pass the "blows bubbles" test but still not work.

I suggest removing the rubber hose from the fuel pump inlet and attaching a clear hose to a hand vacuum pump. You should quickly be able to draw fuel easily. Don't draw it into the pump (might ruin it). If you don't have a pump, you can suck with your mouth, but have a long section of clear hose and stop the second you see gas. You can suffocate from swallowing a few ounces of gas (spit quick). Once you get gas, drop the hose into a bucket lower than the gas tank. It should flow quickly. If so, the pump will do the rest. To stop the flow, lift the hose higher than the gas tank.

I have never seen rust on a sender or on the fuel line, and I bought my 69 Dart in Tampa and it spent most of the 18 yrs I had it near the Gulf. I suspect either there was a slug of rust stuck in the fuel line, the P.O. didn't really put on a new fuel tank, or they put on a cheap one that quickly rusted. Once you fix it, add a little ethanol to the tank regularly to dissolve any water drops in the bottom of the tank. In a humid environment, you can get condensation. It is less of a problem today since a lot of gas has ethanol in it.