the lower mount on the triton shock (12698gr) is too small you cant get a bolt through even after you drill the hole bigger.I have been thinking about running longer leaves, extended shackles and modifying the rear tow bar to allow the shackle to travel further back. i think trition shocks are longer and nearly bolt in, aparently they use 16mm bolt, navara is 14mm bolt.
would also look at running inverted shock mounts as well