Well, since my last name is McCabe....thought i would jump in here
I'm a california guy - central valley - my dad saw a picture of your truck (he farmed in Fresno - Bakersfield corridor...said it was probably a McCabe Coachworks body out of Oakland/Berkeley Calif shop. Probably used by oil companies around Bakersfield and the Elk Hills reserve for oil field services, he guessed hauling oil field pipe. But he cautioned just a guess as pictures were in shadows and hard to get close look at details.



'50 Chevy 1 ton dually daily driver, 1960 Ford F-100, 1972 GMC C-20, 1958 Kenworth, Cat D4, 1972 Ford F100 Ranger