King Kutter Box Frame Disc Harrow — 7 1/2-Ft., Combination,

[John in N.MN]

I have a 860 and have just gotten a used King Kutter Box Frame Disc Harrow — 7 1/2-Ft., Combination, Model# 20-24-CBF. The 3 pt lifts it but makes the front end light. I can steer and by using the brakes, I feel I have control.
I would prefer to put some weight on the front end. My questions:
How much weight?
Where on the front?
Non smoking