Glad to stumble upon this post. In addition to the Gx470, I also have a 92 hiace super custom limited 3L NA engine. It has some issues with overheating but I'm slowly chipping away at it. My next move is to remove the EGR and maybe do a Wilson switch for the glowplugs.
I love seeing this. Your rig falls in the same category as the VW Touarag when it comes to the overlanding and off-roading scene. Highly capable and underrated.