When my fuel pump was shorting out on me, I realized the pump was not fully screwed down against the two rubber bumpers. Do these act a s a ground as well as protect it from vibration? Since I tightened the pump down, I have had no issues what so ever....

Well, maybe it was the vibration that shorted it out?

I dont think that they are used as a ground...

Andrew

No ground in the mounts. Your fuel pump should have a plug with a + and -.

My '74 fuel pump was also shorting out a few years ago. It would pop the fuse on the relay board. I found that the wires in the harness had shorted together due to the heater valve cable (that was disconected at the time) had bounced around and touched the fuel pump wires. The pump was relocated by a PO and the wire connection was bare.

I just ran new wires...

-Mike D.

what he ^^^ says ...

your short is somewhere else, probably the connector plug and/or wires.
Andy