All factory 62 SS cars had an SS emblem on the lower right trunk. If they don't they are almost certainly clones. SS package included this emblem, the interior grab bar and SS panel behind it, SS console between the seats, bucket seats(bucket seats that fold at an angle) with factory welded mounting brackets to the floor, SS swirl side chrome, SS swirl trunk panel(except in some early cars-Sept/Oct 1961), and SS 1/4 panel emblems. The final check and best check is the trim number from the cowl tag, it has to have a trim number with bucket seats. All 4 speed cars SS cars had a shift plate around the shifter. Powerglide cars had no shift plate in 62.
The holes in SS trunks I have seen are punched. I have one in the basement for my 62 SS 409 convert I am doing now.
I see lots of cars called an SS but are missing one or more of these items -the cowl tag is the best way to tell. Nothing wrong with a clone it just should have all of the SS items at least.
Paul