vintagespeed

Ok, please please please dont tell me to search. I have. The only thing to come out of hours of searching & reading is that there are 4 (??) different counterweights. 2 for 12A & 2 for 13B. But there isn't a single thread that I could find that had a way to identify a counterweight once removed from it's matched flywheel.

Does someone have a list of weights or other method to confirm a CW?
Does the rear CW match the front in weight?

I'm sure someone will say "why dont you have the matching flywheel" or "what year did you remove it from" this wont help me. I have one here, I dont know (for certain) what it came out of and I'd like to ID it to see if it's the one I need or not.

-jb