This has to be the most unlikely "hot rod" a motor pool ever put together.
Good description and conclusions by posters to the site. One suggests:
" my opinion is that they had reversed the drive train. Rear axle under the engine and the front diff was placed where the rear
axle was originally attached. The crew compartment was reversed. the
driver is now over the front axle and sat on the right side."
For more info click this link to G503 Military Vehicle Forum.
Korean War Armored Jeep with 3 machine guns and a Recoilless Rifle