1971 until about 4-1-1971 Mercury Cougar. Look for the spacing on the bolts to the hinges. This style has a 3 inch spacing, late 1971-72 deck or trunk lids have a 4-1/4 inch spacing on those hinge bolts. D1WY-40110-A style has the internal style of keeper for the trunk lock cylinder.
For deck / trunk lids it is all about rust under the inner rear lip... We still check it over good for excessive filler, correct contour on all the lines and hidden rust under the weather strip. Keep in mind we also have panels that fall in between an A and B, it is hard to list every grade of panel on our site so sometimes you will have to email to see what we have.
Ford part # D1WY-40110-A.