[83burban]

easy way to check for fuel pump operation is to disconnect the fuel line from either the carb or the throttle body and disconect that ignition wire.

If it is carbed put a water bottle over the end of the disconnected fuel line and crank it for a few seconds - should fill the water bottle fairly quickly if it is good.

If it is TBI - fuel pump is electric - all you need to do is turn the key to the on position - no need to crank - and the fuel pump should shoot fuel out (note that the electric is much higher pressure and will fill the bottle more rapdily)

If fuel pump is fine then check the filter and work your way back for either a leak or an obstruction somewhere down the line.