Perhaps the ultimate is to rebuild your own.......few years ago we had a contractor installing pasture pipelines. He was driving a Ford 4X4 with a 12V 5.9 cummins installed.......said it was the only way of getting a decent engine in his personal choice of vehicles.  :lol:  :lol: We've had excellent luck with these engines....oldest one has 500,000 k & never had the motor touched....just keeps on going & can't be beat for fuel economy.