Jack, sorry for the delay..busy day.
The deck lid emblem was installed by Fisher Body p/n 7752901 so you won't find it in the AIM. The front header emblem p/n 3916654 C-1 was installed by GM which is shown in the AIM. The two emblems look very similar "BUT" they are different from one another.
The dimensions your seeing in the pics are in reference to an ORIGINAL non spoiler deck lid (spoiler was added afterwards which is why you see the two larger holes also) and using an ORIGINAL emblem p/n 7752901 on a 03B Norwood build. If your using a reproduction emblem or the front header emblem these dims may not work for your application...."my little disclaimer"
In general, Lay out these dim's. Take the emblem your using and dab some of the wife's lipstick on the 4 prongs and place it on the lid. If all is original as stated above then you should hit these locations dead nutz !
Good luck, keep us posted.