Hi, thanks to all for all your help!

For a 1976 Chevy Vandura G30, I need the wiring harness that is about directly across from the steering wheel BUT in the engine compartment, and starts with a 2 part black plug on the firewall with a number of wires coming out of it to the headlights, horn etc

Would you please have this part. Actually l only need the right side plug. (right side as one would be facing the firewall as when looking from the front to the rear of the vehicle.).
Also, would you have the turn signal assembly (switch and lever), and the rear taillights/directional signals assembly?

If not, where would you suggest I look for these things? Thanks

Thanks so very much!