My custom LEGO Technic 40th anniversary tow truck. I added headlights, replaced the rear wheels with tank tracks, and added 2 small power functions motors to the bottom for extra torque. :
LEGO Technic Mini-Excavator - 42116 – Mytoyland
LEGO 2x Genuine Technic 40 Year Anniversary White 1x3 Studless 28984 6170737 for sale online | eBay
Technic 40 year anniversary model | Brickset: LEGO set guide and database
MOD] 40th Anniversary Chassis - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums