assuming the conventional negative grounded chassis system kagaya nung 55 chevy namin noong araw ...

+ of fuel pump connects to + of ignition coil

- of fuel pump connects to chassis ground

hindi nga aandar sa ginawa nyong connection doc otep kasi yung (-) ng coil is connected to contact point, not to chassis ground ... although when the engine is not running, the contact point is usually shorted to ground ... which will initially make the pump work, but pump will stop running as soon as the distributor starts to rotate and the contact point gets into the cyclic on/off action (depriving constant power to the pump)

with the above suggested connection, power to the pump is supplied whenever the key is in the ON & START position ... if the fuse for ignition busts due to the additional load, simply increase the fuse rating ... the original wiring for ignition should be able to carry the additional load (overrated ang mga wires sa oto noong araw)

hth