The ceiling in my garage is 8' and the bottom of the steel beam is probably 7'. So the bike would have very short cable/ chain / strap between it and the beam holding it up. I dought a 600 lb machine would swing very much so close to its lift point.
But instead of winching it up. I think a better method would be lift it with one of these..
http://www.google.com/products/cata...XhIanawAXtnpmnBQ&sa=title&ved=0CCkQ8wIwBTgA#p
And then strap on from the beam and lower the lift a touch to tighten the straps. Or pull the jack out completely.
My 2 car garage has limited space.
Will a kerker header support the bike on one of those lifts?