Is a '69 AMX considered a mopar A-body?

When I was a lot younger a mechanic told me that they called the company "American Motors" because they bought all the old stock from the Big 3. For a long time they ran the old Chevy front ends when Chevy had upgraded to ball joints from King Pins and at any given time you could find Chevy or Mopar engines and transmissions in them.
Nope.