I will take the 1lb for the hood, and you can have the 10lbs (9lb) for the radio/speaker. Some of figures can't be right can they? 7lb for a vinyl top, 8 for a console?
A early (no spoilers) base Z/28, radio delete car must end up weighing at least 100lbs less than any other typical Camaro. My car only has the hood and radio for options, oh and floor mats (also has factory spoilers). But even my car would weigh 20+ more lbs than a bone stock early car according to those stats.