Power Hawk was a one year only model. Sedan body, 259 V8. 56 Sky Hawks and Golden Hawks were hardtops.
Below the Power Hawk was the Flight Hawk, also a sedan, with a 186 inch flathead six:
View attachment 1716323559
Sky Hawks, Power Hawks and Flight Hawks disappeared after 56. Golden Hawks 56-58. Silver Hawks 57-59. Just "Hawks" 60 and 61, GT Hawks 62-64.