DISCONNECT BATTERY before doing any work. PLEASE READ BEFORE YOU ORDER: At least 40 years have passed since your machine was built. Many people have worked on, and changed things from factory configuration. It is customer's responsibility to make sure that harness and contact arrangement is correct for the application. Because the previous old harnesses may have damaged components in your electrical system, Pacific Supply Group accepts no liability for any device that you attach this new harness to.
Made in America. 
Running board, Step Side Grate - New Old Stock
CH84 Glow Plug For 7.3L IDI Motor
HPCA (High Pressure Cold Advance) Fast Idle Switch For 4000 Series Trucks With 7.3L IDI
Glow Plug Relay And Timer For 7.3 IDI T444E 4000 Series Trucks - 1811059C93