A Wrekker Trukk.
The wrekker ball was taken from the gorkamorka wrekker trukk
The driver and gunner had their heads removed and new heads added from the ork boyz plastic sprue.
An armoured windscreen was scratch built using mesh and plactic-card, and the headlights were cut away and replaced by plastic-card.
The tailgate was scratch built using 0.75mm plactic-card, piano-wire and chain.
More details on how to scratch built these bits is in the page on converting.
Glyphs were added from the wrekker trukk glyph sprue
Plan of the 3 pieces of plastic-card needed to make the tailgate