Wondered what type of h.p. people pull these with, book says 8-10 per foot. Some people tell me I can run a 31 foot with 8420t easy some say not. I can pull a 28' J.D. AT 8MPH in heavy soils. I understand theses(6333) pull harder with the 190lb. shanksI'm in the ground about4" and would like to stay at 6.5-7mph for sure, Thanks