This appears to be a 1946 chassis with a CJ-3B replacement body. I’m not sure why the odd grille was made/used.
https://www.facebook.com/marketplace/item/927129478031738
“1946 Jeep Willy CJ. The frame is original, engine has been replaced with an early 50’s flathead Ford V-8. Takes leaded fuel. 3-speed manual transmission. Has an after market heater. Odometer has been replaced; new odometer reads 489 miles. Prior mileage unknown. It runs and is in good condition.”