I am not sure the F8U was operational in the 1950s. I was working at Temco Aircraft in 55-56 and I know they were not in production with the F8U(Temco was next door to Vought) and I am not sure they had a prototype at that time. We did hear they were going with a variable incidence wing to solve some of the problems of the F7U,(high AOA during landing) but it seems a stretch to call the F8U an AC of the 50s.
commonly is indicate 1957 as year first assignation to navy squadron (VF-32 and 154)