Blueprints
 

https://www.the-blueprints.com/blueprints/trucks/

Discovered this web site of blueprints for trucks

May be of interest

cheers rod

Drawings
 

The site does not contain blueprints but scale drawings that have been lifted from multiple sources. So much for complying with copyright when a person illegally scans drawings from publications and then hosts them on a website. Remember each one of these scale drawings took a person, usually an enthusiast, hours of research and work to draw so that a vehicle type could be accurately recorded. Free internet content may sound nice and altruistic, but in the end there was a cost involved to someone and this site goes even further by having the nerve to charge for what could be considered to be stolen intellectual property.