here are some of our trucks
mine is the black 379X, its a limited edition and I haul logs and chips on 3/4 axle log trailers and a 4 axle chip van with a gross of about 58-65000 kg. I have a factory 550 C-15 boosted to north of 600, 18 do tranny, super 40's w/ 4.11 ratios and 3-way lock. It might not be a "real bush truck", but I can take it mor places than most company guys in their bush trucks.
the purple one is my dad's 379 being unloaded at the Ainsworth mill in Barwick, On. It has 3.90's and a 13 speed pushed by a 475 C-15.
and the black one is also my dad's truck, but it is driven by my brother, and it's an '87 359 EXHD Classic (also limited edition, its no. 45/359) with a 425 B-Block CAT, 46 000 lb rears with 4.33 ratios and full lockers. pulls like a bugger, it keeps up with my 550.
Also It's for sale! (the '87)