Here's an interesting site I found. Blueprints.com  claims to have over 24,000 automobile blueprints online (though they appear more like a single drawing rather than full blueprints), including a variety of jeeps.  To the right is a jeep labeled CJ-4.  The site manager states:

"I do not claim to have made, scanned or drawn all of the blueprints on this website. I did on the other collect, edit and host all of them, free of charge, in my spare time.

I do not claim to have blueprints for all cars, planes or what you can think of. I do not claim to have all views for all blueprints. I do not claim to have high quality blueprints for all objects. So don't come whining about it when the blueprint you are looking for isn't on the website, or of low quality. Come whining when you have collected and edited more than 18000 blueprints and put them together, for free, in your spare time, on an easy-to-access website, which in total probably took me a couple thousand hours…

I do my best adding as much new blueprints as possible, but now and then I make a mistake and a blueprint is mistitled or placed in the wrong spot: drop me a mail, or leave a message in the forum and it will be fixed within a day or so.

There are no blueprints for sale on this website; I do not have them on paper or as scale drawings. This collection is a digital one (no questions about scale please, since it's completely irrelevant with digital files), it's free and it is what it is, nothing more, nothing less."