It’s propane powered. Lots of mods.

“Slat grille 41 Willys MB, super low serial number (under 3k). 22re got propane powered engine, Toyota 5 speed and t case with crawler gears. Toyota axles with 5.29 gears, Detroit front, e locker rear with cable. 4 link 1/4 elliptical rear end, leaf front, all on a custom boxed frame. Full soft top with doors, warn winch, 2 propane tanks, lots of extras. Runs and drives but needs the lights and winch wired up, could use a tune up as well. Tons of extras, CB, stereo rubicon rack, set of beadlock wheels. Trailer included, for the right price I’ll include an 89 F250 tow rig (11k for it all). 35in old style Goodyear muds, spare is a BFG km. Will consider trading for a small RV of equivalent value of possibly an old VW bus. Registered for the street with a 41 license plate. Currently in storage, serious buyers only.”

https://sacramento.craigslist.org/cto/d/41-willys-mb-crawler-propane/6475090353.html