Chevy must have caught a sale on those...LOL...they appear to be installed never to be removed again. The drivers just don't cut it well when it comes to removal. Penerating oil and tapping them does help,but boy are they tough. I am replacing mine with the same type head (round) with a stainless steel torx type or the perfer allen. I know its not original but it sure does show off well in contrast as the screws appear crome and , best of all, never rust!!!
