In the 1960s, technicians did not have the online training or even VHS cassettes. Much of the learning was received on-the-job or through books. Many books were published by parts manufacturers as a way to build their brand with shops. This book from Dana was one of the best for front end technicians.
This training manual uses cardboard pop ups of suspensions to show how alignment angles change relative to the body and chassis. The author, Loyd O. McAfee, received a patent in 1979 for a Vehicle Steering Knuckle Arm Angle Compensator – specifically, a universal component for altering the angle relative to its associated wheel spindle.