[abig84]

checking the actual fuel pressure might be a good idea? but i dont know if these older chevys have ports for the fuel pressure.

one thing i used to see on s10s and astrovans is the hose going up from the fuel pump to the pressure hose inside the tank will split. so you lose a lot of pressure while its trying to start but once it gets going and the pump is running full time the vehicle will drive fine.

easy way is if you can get a fuel gauge on the pressure line, key it on and once the fuel pump stops if the pressure drops down to zero really quickly thats probably the problem. a good working fuel pump should hold pressure or go down realllllllllly slowly