looking for a real fm3 demon 340 1971.

Can't disagree with any of that comment adriver.
I did say "I believe to be credible", I'm not 100% convinced myself.
Most Mopar publications, as well as "Barrett-Jackson" refer to Galen Govier as the "Guru" of Mopars.
I haven't yet sent him any $, due to the facts that you have mentioned.
This is why I stated I was researching this.
Therefore if Galen has access to this info, he got it somewhere.
This is what I am researching with the help of some very usefull and informative website like the Hamtramck-historical as well as others, guys like that, who help guys like us deserve "MEGA" praises as they don't do this for the $$$$.
If anybody out there can help with this research and share it with the rest of us, it will indeed be greatly appreciated.