1972 Duster wiring troubleshooting

Hi all- putting together a project and having some electrical issues. The car is a slant 6 with a 4 speed overdrive manual that I have wired the safety neutral to ground. I have power to the firewall and up to the anmeter on the dash, but nothing at the fuse box and no lights, turn signals, or anything else. Am I missing a relay somewhere?

And what is a good source for a wiring diagram? I see Classic Industries sells them, but are they worthwhile???