I gave the box blade a good workout this past weekend. I put 4.8 hours on the tacometer on the 135 Massey. I think I had more like 7 hours in the seat though. I can not believe the excellent job the box blade did. All this was hard packed black dirt. I was able to create a drainage ditch through the yard and around the building. I I used all the dirt from the ditch to level out the building site. Although it seems crazy, I estimate that I moved about 14 cubic yards of dirt. I know I moved a lot of dirt. It doesn't seem possible but based on the fill needed, thats what it figures out to be. The six rippers were level with the bottom of the box, so I took someones advice and shortened the top link and tipped the front of the box down to engage the rippers more. It worked great! Once I got through the sod, I was able to peel off layer by layer and drop the dirt where I needed it. I had no problem with horsepower with the 135 gasser, only a few times when I had the box full, one tire would start to spin in the loose fill, but differential lock kept me moving. Once construction is complete, I will use it to clean up and put the final grade before seeding the new lawn.
Its worth every dollar I spent.
Thanks again for everyones advice.
Dan