I like to think that some 70 postings to YouTube
http://www.youtube.com/profile?user=hopeso&view=videos on diesel and diesel conversions has helped,,,, at least a little, to take some of the mystery out of diesel and widen the interest. But maybe not. In any case, the hobby expanded exponentially for
me when I discovered diesel.
In my opinion, any engine built for glow will do well as a diesel. Some exceptions might be those with light conrods or weak cranks. Throttling can be an issue but most times a reduction in the bore of the throttle barrel helps a lot. Muffler pressure helps as well.