dav,
You wrote " box blade" but what model?
I know of 2 models and there could be more.
There a roll over box blade which weights about 550 lbs,and the box blades which weight about 250 lbs.
Bush Hog has both models in 48' & 60' also Bush Hog states box blade needs at least 15hp for the 48"
I have 16hp and Bush Hog 60" box blade and my 3 point hitch unit handles it well.
dav,if you get a chance check out the York Company at
www.yorkmodern.com /w3tcompact/icons/wink.gif /w3tcompact/icons/wink.gif
The model RI to me is the best of both worlds,but the prices will [shock] you!! I purchase the RI model this spring and now my box blade sets idle.
Some tractor operators like to purchase by the wheel base and some don't thats if they have the horse power.
I perfer the next size up compare to my wheel base.
Maybe your locate dealer has some literature.
Take care and have a good day.
Thomas..NH