It is rare.
There are a few people floating around - but I doubt there are more than 6 people with the sohc running an ems on any forum total. I am one of them but my map is pretty sorry and different from you. I haven't spent any time on the dyno, and it doesn't drive smooth yet... but at least it runs I guess.
http://www.cardomain.com/ride/2238899mod list (although its outdated - I have d585 truck coil individual ignition coils now, 1000cc's, and I have the AEM 24 tooth wheel)
My map as of yesterday is here:
http://personal.tastyratz.com/misc/workmap.v1.19.calI hesitate even posting that, but maybe it will at least help you get started a little bit. DON'T go crazy full warning here.
I also have 2 another ka24e maps here:
http://personal.tastyratz.com/misc/shootfirerev1.v1.19.calhttp://personal.tastyratz.com/misc/20g goodness.V1.11.cal
I don't know the full specs on them, don't ask - just reference.