Mule is right we have finishing dozers.
Windrow the roots & debris into burn piles with a grapple equipped exc.
Trade that 9N for something in the utility utility class with MFWD loader and at least a roll bar for safety on slopes. A harrow (same as leveler) will only scratch the surface.
For the larger rocks turned up with the plow I pick them with a grapple on the tractor loader, smaller ones <1000 lbs I have an old 1200lb rated JD skidloader & rockbucket (and a kid to run it).
A large 25K-40K lb dozer is going to destroy your topsoil going after stumps.
yeah, I do worry about that. On the other hand, my neighbor did his pasutre with a D9. Seems fine but he likley cultivated it severely afterwords.
Tractor stays. We are attached. It'll be fine with a brushog and a mower deck.
It has a bucket loader and I used it to build a 3 acre cove onto our subdivision lake. So don't put it down so easily.
That said, when I first tried to just clear the path for a new driveway we had an issue. I put the bucket to the Ozark dirt and the tractor simply said "NOPE, not gonna do it."
I considered adding a Bobcat skid loader but it will just roll down the hills.
Anyways, I am sure a compact tractor, (Kabota has my eye), will fill in the blanks at some point in time. And then the Ford will be put out to pasture,, with the mower attached.
A friend had a backhoe with a static thumb on it for boulders. Most of mine are much less than a thousand lbs so I think the Davis could do it. The track Dozer is not as nimble as a rubber wheeled job. But I only have a small toy budget.
As for the kid, Don't got one of them for the real work.. He's forty and in a wheel chair.