69 Camaro Fender Emblem Placement

[R68GTO]

NOS fenders were installed on my car back in the late 70's so they have no holes for the Camaro emblem. I've done some searching on this topic and found a lot of horror stories about crooked emblems, AIM inaccuracies, difference between original and repo emblems. What say the experts....what is the best way to locate the holes to avoid a glaring error? Should I source some NOS emblems or are the repos ok? AIM instructions give no reference to the location of the 5 & 15 reference lines that the holes are based on.