Very expensive, and excellent quality, cloth-covered original-appearance wiring harnesses are available from several vendors.
Lower-priced excellent quality plastic-coated harnesses are also available.
Ask for names/opinions of vendors, if you need them.
Check out the Tech Tips section here on Stovebolt.com. There might be some articles of interest to you. There is a Tech Tip on documentation that you might find to be useful.
When you post each query/post about your truck, in each new post be sure to post the minimal info about your truck (make, year, model - and, if you want to stay close to original or if you would consider upgrade/modification).
Do with your truck what you would like. If you want opinions on what to do/change, just ask.
