On my '74 the emissions decal is about 3 inches to the left of the hood lock flange. This is what mine looks like:
Click on picture for a larger version.
Here's some closer shots with tape measure for reference:
The decal is about 3 Inches from hood lock's flange, as seen above.
And the decal is an average of 1 Inch to the right of the fender overhang, as seen above.
Again, click on picture for a larger version.
Here's mine installed: