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The major differences between the 1980 and 1982 Daytona and the 1981 GTO are the hood, the tops of the rear fenders, and the rear spoiler/bumper cover. The Daytona had an elaborate, short vertical fin on top of the rear fender that turned several turns “in and back,” flowing to the wide, long, table-like rear spoiler. The GTO’s rear fenders pontoons are the same as.
What you see before you is a 1982 Chevrolet Corvette that has been fitted with a rare Greenwood Daytona body kit.  The most extreme of the Greenwood brothers' kits, the Daytona body kit is a highly sought-after modification that was developed by race-winning specialists Burt and John Greenwood.