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 equivalentEngine 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 locationBOSS 302 -
Both valve covers - Service -
Forward face of the drivers side shock towerBattery 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.