I need help!! fuel pump/ sending unit problems!!

ok i have an 83 camaro with a 2.8 v6 that was swapped in from an 87 but i didnt do the swap, and this car hasnt been on the road in about 12 years, iven owned it for about 3 years, i worked on it all last winter, just to get it running and on the road, and now its on the road but one day a couple weeks ago, it stalled on me, and it sounded like the fuel pump on the gas tank was making a squealing noise, so we checked it out and we figered the fuel filter was clogged, so we changed it, and it ran fine all the way back home, then i drove it for another couple of days and it made the noise again, and stalled, so this time we figured the sending unit, and/or the fuel pump were going, so we dropped the tank and replaced just the fuel pump and fuel filter with a brand new ones, and it ran fine for about a week,,,,,,,which now brings me to my new problem, it stalled once more but now when i turn the key forward, once in a while but not everytime, the pump  kickin on but right now i cant get it to kick on at all and it will not start, please shed some light i need to get my car home and i need to be able to get to work, thanks alot to any responses

Two component to check. The ECM engages a relay that sends power to the pump for about 2 seconds upon first turning the key on. But since yopur pump wasworking hard it sounds like you should also check the fuses.

yeah your problem is definatly electrical, i would start with the wires that go to the pump itself, they may be corroded and just not making a good connection, the reason i say to check these first, #1 its a simple check, #2 if you replaced the pump and it worked good for a little while, disconnecting the old one and reconnection the new one may be enough to give it some connection for a little while. and just work your way thru the electrical until you find your issue. 

Thanks so much guys!!! it was actually where the sending unit plugs into the plastic connector on the other side of the back seats under the car, i guys we must have bumped it and it must have vibrated loose over time, thanks alot you guys were a huge help!!

systemsmack