I would say Drop your door windows, meaning No More Windows - think convertible with a broken top, you don't need driver and passenger windows if a race car is what you are after. This also lets you remove all of the electronics involved.
You can also remove the side hatch glass and replace with aluminum panels, like a mustang either with or without vents. The front and rear should stay, maybe call auto glass repair and see if just getting a newer windshield is a bit better, thinking advancements in production - who knows. The rest of your weight loss can come from Forged Wheels and Really Nice Tires, light tires are very expensive but as with the wheels, it rotating weight thus more benefits. Tires can be very heavy suckers, My rims are 19lbs without tires, and can vary as much as 40lbs with cheap tires - Boat anchors.
The last stage is to address the engine compartment, get rid of anything cast iron where possible.
Drop your heater core and associated electronics to carry less fluid.
Dump ALL EGR Smog Crap, not needed, and technically speaking is a joke of a system.
All that said, you still have one heavy bitch that went on a diet!