The foglights and brackets only weigh 1.5 pounds each, so you're off a bit in your estimate, Micah. The glass hood should save around 30 pounds depending on the design; installing a lightweight battery like a Braille saved me 17. Definitely get an aluminum flywheel if your car is a 5-speed. Replace the stock IC tubes (12 pounds total) with mandrel bent aluminum tubing. An aluminum radiator saved me 6 pounds. The stock front calipers are iron and Mustang GT calipers are aluminum, though I don't know the difference in weight. Vogtland lowering springs are a few pounds lighter than the stockers; ST and Eibach springs are heavier. Make your own front coilovers using 2.5-inch ID springs, as I did. What size/design wheels and tires do you have? Odds are you can save weight there unless they're stock. You can save some good weight on the exhaust system using custom components. Plastic idler pulleys will shave a bit of weight over the stock steel ones. How much do you value big sway bars?
On my car I've gone so far as to trim the unused intercooler tube brackets from the PS pump bracket. Plastic flex tubing replaced the chromed steel air intake tube. DD even replaced my aluminum C&L MAF with a plastic SCT one. In general, find steel parts and replace them with aluminum, then find aluminum parts and replace them with plastic ones. Remove all the parts and lumps that don't need to be there.
My car weighs 3,433 pounds nearly empty even though it still has AC, a full interior (except for the stereo), all the factory sound deadener, Cobra R brakes, 17x9 wheels and big sway bars. Half a pound here and there begins to add up after a while.