The silver glaze is a sharp color. Not that my opinion is valuable, but I definitely would stick with a stock color for the year if the car is close to a stock restoration.
I finished a 68 Firebird close to 10 years ago and fought with choosing a color for nearly a year. Well, I ended up going back with the original color, April Gold. So glad that I did because the car has won a trophy every year it has been entered at the Trans Am Nationals. The car sticks out and gets plenty of attention due to the rarity of the color compared to the other cars in the show.