I changed your post title to be a little more descriptive. I will look on my 12 and 8 and see how I would do it. I haven't done a swap like that yet but I might be able to give some suggestions if I were to do it. I know some of the other guys have done the swap and should be able to help.
No problem that's a better tittle.
Reason I ask is there are HH engines and HM engines.
HH has intake and exhaust on different sides 90deg. apart from one another.
HM has intake and exhaust on the same side.
Wondered which 10hp engine (HH or HM)was being used and how they ran the exhaust.