Another favourite Holden ute of mine was the Overlander 4x4, based on the HJ/HX/HZ models. And there was a handful of HZ One Tonners made, too. Tasmanian Arthuy Hayward produced these in the 1970s and they were only available with V8 and auto trans. The chassis strengthening and Dana running gear he used made them incredibly tough and durable vehicles, many of which are still running around today with huge mileages on them.