The Daytona was Dodge's NASCAR aerodynamics weapon for the 1969 season — a 1969 Charger body with the Charger 500's flush rear backlight and A-pillar grille modifications, then a pointed steel nose cone added forward of the front wheels and a tall (23-inch) airfoil rear wing mounted on backward-swept stalks. The wing's height existed for one engineering reason: to clear the trunk lid for the spoiler's pivot mechanism, since shorter wings didn't pass the trunk-lid test. The aero math worked. Buddy Baker drove a Daytona to the first 200-mph lap on a closed course at Talladega in March 1970.
Production: 503 cars (NASCAR's 1969 homologation rule called for 500 examples; Dodge built 503). Per the Wikipedia article, assembly was Lynch Road Detroit, summer of 1969. The nose cone and wing assemblies were fabricated by Creative Industries in Detroit, with donor 1969 Chargers shuttled over for the modifications. 70 of the 503 cars carried the 426 Hemi; the remaining 433 ran the 440 Magnum. Per the 1969 Dodge Charger Daytona pre-production folder, the standard engine was the 440 Magnum (375 hp / 480 lb-ft / 10.1:1 / 3.54 axle with 4-speed Sure-Grip, 3.23 with automatic) and the optional engine was the 426 Hemi (425 hp / 490 lb-ft / 10.25:1 / 'two tandem-mounted 4-barrel carburetors'). The folder also confirms the aero inheritance from the Charger 500: 'flush rather than tunneled rear window' and 'windshield moldings will be of the flush design used on the Charger 500 models.' The Daytona's wider wheel openings 'accommodate the trend to larger tire sizes' per the same folder.
Designer — the underlying production Charger body was Richard Sias's 1968 reskin (covered in the Charger entry). The aero addenda — nose cone, wing, A-pillar gussets, flush rear window — were engineering work, not styling, led by John Pointer with input from Bob Marcell, Dick Lajoie, and the Chrysler Special Vehicles team. The wing design is engineering pragmatism wearing a costume.