Jimmy the best advice I can offer is to go to
www.nastyz28.com
An excellent 2nd gen site.
Z/28 is spelled out on the trim tag so if it's the original tag it's a no brainer.
2nd gen cars are creeping up in price. Grab it while you can.
Split bumper indicates Rally Sport. Should have the parking lights above the bumpers next to the lights not below. Parking lights below the bumper are standard Camaro. If it's a true rally sport it will have chrome trim rings on the tail lights and back up lights. There are other clues. Check the site out.
Good luck.