Engine is stuck.
https://washingtondc.craigslist.org/nva/pts/d/alexandria-willys-cj-2a-industrial/7131773512.html
“Complete Willys CJ-2A 4 cylinder flat head engine with all accessories and governor. This item sat in a shed for about 25 years and has been covered by a tarp for a couple of years after originally going out of service for fuel tank reasons. Item is stuck from sitting and is still attached to the arc welder it powered and on the trailer it is transported on. Sold as is.”