Found the article about converting a Sanden compressor. Let's see if I can link it to here.
https://www.fourwheeler.com/how-to/engine/154-1207-homemade-engine-driven-onboard-air-system/
Make sure you click on the "See All 13 Photos" link as it shows them taking the Sanden compressor apart.
https://www.fourwheeler.com/how-to/engine/154-1207-homemade-engine-driven-onboard-air-system/
Make sure you click on the "See All 13 Photos" link as it shows them taking the Sanden compressor apart.