Whitmore,
The DT466 is probably one of the best M/D diesels ever. It started as a mechanical, rotary pump diesel back in the mid 70's. It then changed over to an in-line Bosch pump up until ~'95, then it became the DT466E (electronic).
Most popular power level is 210/540. It makes ~90% of it's torque on clutch engagement, so it doesn't bog down out of the hole.
It's found in trucks from 22,000-76,000 GVWR and many types of farm & commercial macinery, even log skidders, so it's quite versatile
It has many power ratings up to from 190/520 up to 300/860 and has very few known problem areas.
It is very cheap for parts. I have a friend working at IH parts and has quoted me $5,500 for a completely new engine....much less than most light diesel engines.