Definitely a different fuel pump setup than the injected cars!!
I agree with the advice on here about checking the double relay.
You can unbolt the air flow meter from the air cleaner, then turn the key on and stick a pencil or a chopstick or something into the end of the meter to move the vane. That should get the pump to run.
Dig into the wiring diagrams for the L-jet system and have at the car with your voltmeter.
http://www.pelicanparts.com/914/parts/Electrical/914_electric_74_AFC-B.jpg
http://www.pelicanparts.com/914/parts/Electrical/914_electric_74_AFC-A.jpg
--DD