I took the prop adapter off and the crank has a big dimple in the end. I also looked at the rod through the carb and it is the dark copper/bronze color. I noticed that you refered to it as a A&M or Sachs crank not an A&M or Sachs engine. Does this mean that the engine itself is a Sachs engine if it has the features described above? Just curious about the lineage.
Also the ignition module has an 8/94 date on the back. Will an ignition that is this old tend to generate more RFI than a newer version or should I not be concerned? I don't know its history (i.e. abuse, crashes, etc.) Should I replace it just to be safe or just try it in the plane and do a good range check on the ground? I still want to switch it mechanical to electronic advance. Any tips on performing the switch?