[al lkosmal]

This has been mentioned above, but the 77 CIS system will not turn the fuel pump on unless you are cranking the engine, which results in the air-flow paddle raising, opening switch contacts that then provides power to the fuel pump. If your fuel pump is coming on when your ignition is in the on position, something is likely not wired correctly.
There are two , two pin connectors located in the harness .....one plugs into the air-flow meter and the other plugs into the cold-start valve. They are identical and if the cold start valve connector is plugged into the air-flow switch and vice-versa.........it may result in symptoms like you are experiencing.
The fuel pump would come on with the ignition in the on position (if the engine is cold) and then shut off........so your engine will start and die. When the air-flow paddle in the closed position, i think that with the ignition in the on position, there will be power to the cold start valve , but it will turn it off when the paddle is raised, when cranking..........

so, it's a long shot, but I'd check /verify that those connectors have not inadvertently been switched.

regards,
al