The Kerr, would work great for a standard engine stand.....but mine are gear reduction heads that do not come apart. However, I could take the specialty motors drive holder and take the square tube thing off of it and bolt the round piece to my ears on my gear drive head. That would be SAWEEET! I will snap a pic later and show you what I am talking about.

I know what your saying now,adapt the bench mount to the plate that the arms bolt to on the engine stand head thats gear driven,Smitty