Toyota DOES make the 1VD-FTV V8 Diesel with either single or twin-turbos, depending on application, and where in the world it's being sold. In the 70 series Landcruiser, they had to widen the front track to accommodate the width of the engine. The issue with that is they didn't widen the rear to match, so the rear track is slightly narrower. That can present handling issues in sand or when driving in ruts. There are aftermarket solutions to widen the rear axle (track).
The Canadian company I mentioned earlier in the thread imports left-hand drive 70 series Landcruisers and outfits them strictly for Mine use. According to the company, their clients have tried the more readily available alternatives. Think Ford, Chevy and RAM trucks for Mine use. They simply do not hold up as well to the abuse, so they generally stick to outfitting these 70 series Landcruisers.
I found a video talking about this:
didn't know this. So you think this is the mistery behind the narrow rear wheel track which is not generally well received