Dude, I had a 70 with the short spoiler and a 73 with the bigger one. I'm still trying to find the correct answer on this as I search for another Z.
Yes
Yes
all camaros are rear whell drive
Rear Wheel Drive. All Camaros have always been rear wheel drive 1967-2002 and the newer (2010) Camaros will be as well.
rear, but only 1 drive tire unless positraction
Many Honda Civics come stock with rear spoilers, but the older and cheaper Honda Civics will not come stock with rear spoilers because they were not invented back then.
no, Camaros use a leaf spring rear suspension while Chevelles use a coil spring rear suspension. The overall width is also different.
No, all Camaros are rear wheel drive.
Spoilers decrease gas mileage. Spoilers are designed to create down force, which creates drag. The drag will increase gas usage.
Yes
Not all Iroc Z's have rear disc brakes. It was an option for all Camaros not just the Irocs for the rear disc brakes. Most likely if your car has the code G80(RPO codes are listed in the glove box in the center console) then it will have Rear disc brakes. However ALL 5.7L IROCs do have rear disc brakes.
Spoilers work by using the air flowing over them to help hold the rear of the car down. This down force is useful at high speeds to prevent the rear from lifting and causing the driver to lose control.