new guy needs some help.

[mr.lovesickblues]

first post here, hopefully someone can help me out! I got me a long bed 65 chevy C-20 with a 350 rebuild and 2 speed tranny. I believe the problem is either coming from the fuse block, or a bad wire connection. First off, my truck will shut off and I wont hear the electric fuel pump running. There is two things I do to get it started again. 1. tilt the fuse block up and to the left and I can hear the fuel pump goin again (sometimes this wont work) 2. wiggle some wires til i hear the pump goin but the connection doesnt seem to stay.
Any ideas would be great! Ill try and get some pictures up asap.