My old Ford 2000 (about 1964) does a decent job with a 6 foot King Kutter bush hog. Bogs down sometimes in very thick material or mowing lots of brush/trees. Can I expect at least equal performance with the TC30? It is a used 2002 model.
You really need to compare PTO HP of your old Ford to the NH TC-30. IIRC, the TC-30 gear puts out about 23-25 PTO HP.