Looks like it would be powered by a V8 or something, but it still has an f-head.

“Beautiful 1951 Jeep original 39,000 miles 4 cylinder with overdrive
This vehicle is drivable and ready to cruise ,or fun at the weekend car shows.
Would cool to have a surfboard for the top, would make a fantastic beech vehicle!
Please call ne emails or text will be answered due to spam
Dealers ,I do not need help selling !
This is only a 3 owner vehicle and has always been garaged. Original paint , the upholstery has been newly redone.”

http://kansascity.craigslist.org/cto/5628239829.html