This is not a group for any/all American cars. There are groups on dA for other brands. Just ask and I'll be happy to point you in the direction of them.
This group is specifically for cars made by the American Motors Corporation (including predecessor companies Nash & Hudson). We're open to any Nash, Hudson (including Essex & Terraplane), Rambler, AMC, and even Jeeps made between 1970 (when AMC purchased Jeep from Kaiser) to 1988 (when Chrysler absorbed AMC).