It's a painted bow-tie logo with "CHEVY" in the center. The complete slogan says "Chevy is the difference."
The other info that I can make out in the original photo is the owner/driver name on the door. It reads "Tom Garrett's" "Tribulation". "427 CI" is painted below the Camaro emblem on the front. I'm having trouble making out the name of the town on the rear quarter, though. Need a jeweler's glass I guess. It looks like "Newoosite, Okla" but that can't be right. Mapquest and Google return no matches. I'm sure of Ne???site.....I think.
Also....there is a chrome trim strip rocker molding on this car. Did COPOs have those?