Try as you guys might you cannot present any challenge that I have not already attempted.

I wish someone would have success !
I'm at a total loss as to where to look or what to try next.

Sadly, I did rotate the 1/4 turn valve on the mixer......tried it both rich and then lean.......no difference.

I called IMPCO and they refereed me to their tech support distributor who specifically told me the Model J and the CM100 is in fact the very components they recommend for this engine.
I had the mod J, and bought the CM100 from them last week.

My mind is per-occupied trying to find some possible clue as to what this may be......
Sometime tomorrow I will try a different coil.
And I may make a spacer to take the place of the velocity governor----just for a test.