I used 4 ratchet straps. One attached to each of the 4 corner mounting points on the body, going up to padeyes screwed into the ceiling beams. I had one pair of helping hands and that was enough. The ratchets let us lift the body bit by bit and without having to hold the body ourselves. However you do it, having some way to lift a bit and then lock the lifting tackle, while you investigate, is a good idea. Being able to take your time and check to see what's happening takes a lot of the stress out of it.