Here is an update. I have babied the Fuel pump that was installed in November, 2008, by NEVER letting the fuel go below a quarter of a tank EVER, and changing the Fuel filter regularly.
The pump is still in the truck, and so far (Knock on wood), it still starts the truck after a year and a half. The Airtex Pump still does not hold pressure after the key is turned off and never did. The Airtex Pump is noisier than the original and I can hear the pump whine while driving.
I still say to go with the AC Delco/Delphi pump every time. The Airtex pumps are Junk. If you did install an Airtex Pump or any other pump for that matter, change your fuel filter at least once a year, and always keep at least a quarter of a tank of gasoline in the truck. Besides, if you are only adding 12-15 gallons at the pump, it is a little easier on the wallet.