For more information about the 1HZ 6 cyl engine click here.

The 1HZ engine was never available in North America except for in very rare Canadian Mine Trucks which have never been speced or approved for highway use.  What makes them so rare is that not only are they in a body style that was never available in the USA, but they have the H55F and 1HZ diesel engine which is a great workhorse and still available through out the world. 

Here is a picture of rare Canadian Mine Truck:

A Crazed Canadian Miner offroading his 7,000lb mine truck.