Okay, spent a little time with a grinder with cut off wheel, sawzall and file. The two mounting brackets and four cleats had to be dealt with. I got it to be a 99.9% perfect fit. I had one problem child that I just couldn't get perfect. Got the holes marked and drilled, put everything on snug, then put the bucket with tooth bar pointing down on the work table, put enough pressure on it to lift up the front wheels and got the bolts as tight as possible with 12" wrenches no cheater bar, and went to work.
THIS THING IS AMAZING!!!!
The main reason for getting it was to clear brush and small trees, I'm clearing brush to extend my usable back yard to about 1/3 of an acre to be fenced for the fur and feather kids, nieces and nephews to play in. This thing pulls up brush that I didn't even mean to pull up. It actually sliced through a few 2 1/2" small tree trunks. After uprooting all of the holly, elm, oak and walnut that I could reasonable do without putting on the forks to carry to the burn pile. I went to work with the box blade to clear debris and smooth the ground. When I was making sharp turns to drag and then push with box the bucket edge would get into the thicket and grab 1"-1 1/2" holly and uproot them grabbing them from 3'-4' from the ground.
If you need an attachment to your loader for clearing brush and saplings, THIS IS IT.
When my wife got back from shopping she was amazed at what I did while she was gone. I got about a 1/6 of an acre cleared in a couple of hours with the bucket and box.
I've got 35 acres of East Texas post oak belt thicket with a few narrow trails on my hands and I'm about to have a huge fenced yard and some roads.
I also have to say that I'm glad that I went with the LS XR4150H. I think it's the largest tractor, with power to spare, that I could reasonably use in the woods.
Thanks for all of the input and replies. I'm a happy woodsman!