The configuration for this car is odd. It has power seats, heated rear window, hitch kit and the two-tone horn but no AC, lower tray package, dual map light dome lamp, or either the naturally aspirated or air pump air injection system for emissions control.
The more I look at this car and AMC's history, the more I realize how painfully obvious they were hurting for money. Look at the photos near the beginning of the thread, now look at a '72 model Hornet wagon from a decade earlier.
There's a FEW trim upgrades but otherwise there was pretty much nothing spent on modernizing the frame and body.