Fuel issue?

[dremmick]

I have a 67 long box that I recently took out of storage and has not been ran in 5 years. Suprisingly the truck fired right up! I changed all the fluids and added a inline fuel filer then started the 2 hr drive home. After about 30 miles of running great all of a sudden the eingine was surging/starving for fuel. So i pulled over and let it sit for 5 mins. Then went down the rode 5 miles and did the same thing. If i let it set for 5-10 mins it runs good for only 5-15 miles.

So I had my dad run to town to grap me a new fuel pump and fuel filter for the quadrajet (inlet). Track ran great for 18 more miles then did the same darn thing.

Any idea what would be causing this? Sending unit?