John Deere 2-cyliner model A, late styled, including engine, transmission, PTO, hydraulic system, steering, thermosiphon cooling, and the Roll-O-Matic front end:
1970 Fiat instructional cutaway car. Swiped the pics from a current auction on Bring-a-Trailer. There's over 180 pics of this car on Bring-a-Trailer if you're really into it.