Dutch, as a second owner of a 68 Z back in 1971, which had the 302 emblems, I can relate to your story. As soon as I bought the car I made a BLine down to my local chevy dealer to order Z28 emlems. I even but them where they didn't belong. The front grill and the rear panel. I was 17 and wanted everyone to know that I had a Z. I later wrecked the front end of the car and had to replace the grill, valance, and hood. I had ordered a cowl hood but the dealer ordered and SS hood. Being in a hurry to complete the car, I used the SS hood.
So if any off you out there have a Lemands Blue, white stripe,68 Camaro with 4 Z28 emblems and an SS hood, I still have the bill of sale which states the car is a "302" sport coupe. Also, this might be one of the few cars I might work out a swap for my Z10. I've regretted selling that car since 1974.
Kris