The seller notes this is likely an MB, even though it is registered as a GPW. The engine is out of it.

https://sfbay.craigslist.org/nby/pts/d/petaluma-1945-willys-jeep/7704788760.html

“1945 or so Willy’s military jeep. Registered as a Ford GPW but my research says Jeep/Willys. Original flat head block has crack in #4 cylinder hole. I found good block and crank but have lost interest in job. I was driving Jeep until cylinder lost compression last year. Brakes just rebuilt. New tires. Original transmission and running gear. Pretty much all original with some rust and bondo. I have current registration. Selling as is and must towed (has tow bar). If interested email me and we can negotiate.”