Yea, the manual doesn't give any dimensions for such a tool.
After trial and error, I cut a 1/4"x 2 1/4" rectangle from a piece of a wooden paint stirring stick.
I'm going to post a picture showing it in use during my engine assembly, as soon as imgur.com is working correctly.
I can't access my photos on that website tonight
I made a tool to install the engine pulley/dampener. See if I can find it to get a photo.
If I remember correctly, the bolt isn't long enough to start the pulley on, and you don't want to pound it on, as the trust bearing surface could be damaged.