After some more research, I think I'm interested in the Plowmaster 100 series from Oliver.  Sounds like it's a pretty common plow and shouldn't be too hard to find.  I do have hydraulics but I'm ok with a mechanical lift.

Does anyone have experiance with 2-14s and a 66 diesel?  I'm worried about it being able to pull 2-14s in the black central iowa soil with no wheel weights.