Stude17,
I looked up the Stoddard-Dayton engines and they are by far the closest to this one. Oil pan is same type, mounting pads on the block are similar, flywheel and clutch are similar. I looked at the '07 K, the '08, and the '11 mod 30 and all have similar type parts but not an exact match.
It sure looks like someone copied a lot of Stoddard-Dayton ideas.