Hi,
I recently swapped a chonda onto a rover base. As long as you use the correct spacers when mounting the engine it looks odd but works well. I used the engine from a lawnbeetle plastic waste of time base) which has a metal plate underneath the body which shields the engine/user from flying dirt, clippings and stones. If you are going to mount an engine higher than the original engine for that body make sure you think about the gaps being created otherwise someone could get very dirty, angry or worse badly injured.
No reason you cant do it if you do it intelligently.
Pete.
