[PurelyGTO68]

Very helpful. Thanks.
Looks like Pontiac called the color of the stripes and decals "Cameo Ivory" per page 293 from the Book of Information. The preceding page shows the paint numbers for Cameo Ivory so I should be able to get a match.

There is a helpful diagram for decal and stripe placement on page 320 so I could use that as a guide. Will look for NOS decals and go from there. I could make my own if I can have a sample to match the font. My guess is the reproduction decals failed to account for the curvature of the quarter panel but that is just a guess at this point. I would have to see an NOS and reproduction decal side by side to make that determination.

Interesting note on page 320....it refers to the decal color as "white". Obviously means ivory but it's interesting just the same. Note the part number 9788233.

Now I know what I need. The hunt is on!