JD 790, Steiner 230, IH 340U, Farmall Super C, Farmall C, IH Cub Cadet, Wheel Horse 8.75
I think your best bet would be to contact a implement dealer
in your area who's familiar with your soil conditions...
In some really heavy type soil the 790 might have a problem
with a single 16" bottom and in light sandy soil it might manage
two 12" or 14" bottom plows...
Keep in mind that a JD 790 is light for it's horse power...