[Dan Case]

There were also forged versions that the wings were curved back significantly like with a press.

Late 427 Cobras with Sunbursts usually had nuts machined with smaller tapers. Some CSX33xx cars got aluminum nuts on one side and steel on the other.

KO nut specifics and applications is a very complicated subject for owners restoring original cars that lost their original parts over time. (As early as 1969 it was very common for every car to get their KOs reworked ("restored") or replaced every time the cars changed hands. Even a few original owners detailed their cars before the 1970s after they figured out the cars as new cars were done. I have seen very low mile (as low as 800 original mile) 427 Cobras with post production nuts in use.)