I have been asked about the engine stand adapters I used in my CB750 rebuild thread three times now in PMs. I searched for the post that Gordon explained them in, but came up with nothing. I guess I was just lucky when I stumbled on the design specs, so I scanned a pretty decent drawing of the adapter for anyone that needs it in the future. At the time of this post, Home Depot carries both the #8 bolts and the 1/4" steel stock.
You need 4 of these.These work to modify a standard engine stand to mount a CB case or any opposing bolt type engine. I used one of Harbor Freight's 1000 lb. stands.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=32916You will need four of these adapters and a few 1" and 1/2" spacers to slide on the engine mount bolts depending on what size of gap you end up with. It will vary depending on the engine you are working with.
If you don't know what I mean about the spacers, just don't worry about it. When you go to tighten the case to the mount you'll say "oh, I need a couple spacers here" and it will be obvious what they're needed for.