RE: mvvs 58 limited edition
Steve,
My mistake. The LE engine does not have the steel insert in the prop drive, and you indeed can see the woodruff key between the crankcase and the prop drive.
If the ignition fires a few (5) degrees before top dead center, there is no need to remove the drive.
This leaves wiring to be checked, engine mount integrity and needle settings.
Are your plug caps pushed down all the way? They need a real hard push. When done well, the shielding does not gap. I tie-wrap the shields for extra insurance, especially the black earth wire has a hard time in there. (you did connect it to engine mass did you?)