AMC = Mopar?
Personally, I'm gonna say no, AMC isn't Mopar. More like the red-headed step-child. Welcomed into the family, but everyone knows they aren't "family."
I've got a good friend who's hot and heavy into AMC. He's got a couple of Javelins, an AMX, a bunch of Ramblers, and tons of parts, including a couple of GM sourced switch pitch TH400's. Those trans are AMC only, as they won't bolt to a GM block, and almost totally useless to the GM crowd.
He won't call his AMC's Mopars. I doubt if you'll find many AMC guys who will.