The 1940 Blue Streak is suppose to have an AJ-2A.
The MS 85 C showed up on several earlier Champions as shown in the list.
I appreciate all this help and information. Wondering now if there is such a model that has the tear drop tank like the B1F but this older carb or might I have some sort of frankenmotor? In looking up those early motors with the carb, they all had tank like the D1D. Exactly where can I find the model #? There are several markings but most look like PNs for specific parts