log and you don't want to drill through the outside of the keel- or what is called a "drill out". I had one. You fill it with a wooden dowel and try again. Its very hard work and very stressful.
The next sequence of pictures shows the set up I used with scaffolding and chain falls to flip the keel on its side for various things like bolting flat bar onto the bottom for a grounding shoe.
This is also the set up that I mentioned as a near death experience in my "safety" post.