Im looking for a wiring diagram for a 79 Chevy 3/4 ton with a 350/sm465 that goes from the firewall to the engine as my truck had an engine fire and i need to replace the whole front harness, I've used search and came up with nothing. Any help would be greatly appreciated.

The back of a Chiltons or Haynes manual should have what you are looking for.

Alright thanks, I'll check Kragens tomorrow. In the meantime is there nothing online?

Might be something over on http://www.coloradok5.com/.

Go to Autozone.com and type in your specific truck. They have the wiring diagrams online under the "repair it yourself" section.