Crack the gas cap loose to make sure the tank and/or the cap is breathing properly. A sealed tank will lead to no fuel pressure, especially when using the stock fuel pump. It may run okay on a cold start, then get progressivly worse fuel pressure as vacuum builds in the tank.

Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph