No real dimensions as I was just using scrap wood I had laying around. 1/2" thick of plywood for a base approx 22" x 16", two blocks of 2x6 wood approx 4" long, one on either side, trimmed to fit between the front motor mount and the center stand mount. Another 4" block of 2x6 wood at the rear to lift from the rear cross frame member in front of the swing arm and finally a 9" length of 2x6 wood notched to fit around the bottom of the timing chest.
You are still lifting by the sump but the wood provides some cushioning and the placement of the wooden blocks spreads the weight to the frame rails also. I added the block under the timing chest not so much as a lifting point but as a balance point as things tend to lean forward when lifting.
Can't provide a pic as I lent it to an airhead buddy who is working on his.