Points on the twin are automotive Bosch GL19, with the extra metal cut off. Single is also automotive but they are what I had lying around, sorry I cant remember the part number.
The Nova was a long stroke side-port diesel (compression ignition) engine. This one is different as the design has been changed to spark ignition.
The original plans came from http://www.modelenginenews.org/ thanks to the late Ron Chernich. The plans for the original diesel are still available...