* The driver's side dashboard: Check near the firewall.
* The driver's side doorjamb: Less common, but worth checking.
* The frame itself: Look along the frame rails, particularly near the front.
* The engine block: Sometimes an engine number was used as a form of identification.
You'll likely find a number stamped, rather than a full VIN as we recognize them now. It's likely to be a serial number or a combination of letters and numbers unique to that vehicle.
To improve your chances of finding it:
* Consult a Willys Jeep CJ-3 parts manual or restoration guide: These often have diagrams indicating where these numbers were typically stamped.
* Check online forums and communities dedicated to Willys Jeeps: Enthusiasts might have experience with locating these numbers on specific model years or variations.
* Contact a Willys Jeep specialist or restoration shop: They'll have the expertise and experience to assist.
Keep in mind that age and weathering might have made the stamping difficult to see. You may need a wire brush or other cleaning tool to reveal it.