Made an upgrade of the 9398 with XL motors and gave it 30% more additional parts. This is my MK2 version as my first upgrade was not as successful. Also it uses
9398-B Alternate Model (4x4 Offroad Cab-Over Truck) - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
Custom RC Car Chassis Built from 9398 Parts
LEGO TECHNIC: Rock Crawler (9398) -- Retired set; great condition & all pieces | eBay