What trularin said.....
Plus another set of hands.
I have done this many times with my Contemporary, by myself, it will scare the s%@t out of you when it is way up in the air swinging and dangleing over your car!
I know how I feel with my poor little fiberglass Contemporary, I can't imagine it with an aluminum Kirkham
As long as you have another pair of hands to keep things steady it should go smooth, and your heart will not be on the ragged edge of explosion the whole time.