We've hauled almost that close, and are within 6" on a machine we haul almost regularly. If you have the option not to, don't. But, if it must be done, then I wouldn't have many problems doing so. Just make sure to overkill it when you are strapping down. And make sure the pull is even to each side. Cause if you have a chain, for example, pulling to the left with much more force than that of the right, and hit a bump, your nice machine could become a nice, deadly, little speed bump for another vehicle driving on the road.
That said, you can do it, just overkill it and measure everything right. Double check EVERYTHING.
Be safe,
Kyle