Probably sports an F-head.
https://bloomington.craigslist.org/cto/d/heltonville-48-jeep-willys/6865791834.html
“1948 Willys Jeep. Runs and Drives Great. Starts right up every time. Great for hunting/farm. Priced low to sell. Have soft top rails and 50’s to 60’s aluminum hard top that could be fitted.”