You need a Chevrolet Heavy Duty Truck Parts Book. Do a search on the big auction site...you want one that covers up to 1960 or 61ish to make sure it covers any late year/next year upgrades. I've recently seen the 1955-2 thru 1960 2 ton and 2-1/2 ton...this would be a great addition to your truck library.
Mike B
