Hi Chuck lets see if we can help. Mixture of Cougar and Mustang pictures used to illustrate the details - both were assembled by the same workers and on the same line at Dearborn as you know
For location
Tire pressure decal - drivers side door above the door latch and top screw if same as a Mustang. By this late date Mustangs would have been well into using 1970 marked (part/engineering numbered) tire pressure decals. Have not studied the Cougar equivalent
Engine ID decal - Drivers side valve cover, close to horizontal on the face (towards the radiator) of the valve cover
Air Cleaner - Air filter replacement. Drivers side of the base, between the vacuum motor and the breather attachment tube location
BOSS 302 - Both valve covers -
Service - Forward face of the drivers side shock tower
Battery inspection decal - located typically slightly forward of the start solenoid just below the top edge of the passenger side front inner fender panel . Just a general area.