Weirdly, it's the same thing sarge's is. A gas tank... except from a boat... just bigger.
So a boat gas tank, trail 90 17" wheels, front quarter elipticals, go kart front axle & such, rear solid, no suspension (as per specs), pillow block bearings, steering wheel came on a go kart, new they're 179.00. Fits it.
Yes, OD green coming soon, just gotta do my usual mock up... ya know.