Great topic. There are a lot of us who keep these trucks running on a shoestring budget, regular maintenance, binder twine and duct tape.
This is my 76 K20. It has been my daily driver, plow truck and bush truck for three years, and enjoyed every minute. This truck has been owned locally by friends for the past 30 years, so well acquainted with it.
The box was so rusted had to replace it.