Higher/faster gearing INCREASES damaging torque stresses in gearbox, thus be careful. Can overheat motor with increased load 5L not recommended for turbo. Gets too hot too easily. Other posters indicate piston failures with turbo. New motor made to turbo 3.0L diesel. Hilux never made as powerhouse-not suited to that purpose, tho many have spent much, few actually seem to succeed. Nissans have bigger engines, bodies for same year, and I would expect them to have more power, but if you really want/need a tojo, then you'll have to just lump it. Silk purses/pigs ears come to mind. My LN147R has more than enough power for my driving, and I could easily live on <60KW diesel if it were still available in a 'lux without efi. I was actually quite happy with an L motor with sidecam/rockers in a 1.4T hilux. It was very good.