There's a four-cylinder engine in there somewhere. Mancinetti mounted a York compressor to power the extensive on-board air system and to run the Air Lockers. Despite the busy engine bay, there's still plenty of room for a V-8. If you don't believe us, check out the length of the radiator shroud. The combined length of the radiator shroud and the inline-four leaves plenty of room for a Bow Tie 350. Since the rest of the Jeep is already built, the V-8 looks to be the final step up for this red YJ.