See
http://www.thirdgen.org/newdesign/tech/techdb.shtml , about 1/2 way down, Camaro History, 1983: "5.0 liter H.O. motor introduced mid-year (March 1, 1983). H.O. motor came with a higher lift and longer duration cam, dual snorkel intake system with `5.0 Liter H.O.' decal on air cleaner, specially calibrated Quadrajet carburetor, lightweight flywheel, electric cooling fan, bigger 2.75 inch exhaust and Corvette style wide mouth monolithic catalytic converter, `5.0 Liter H.O.' exterior badging, and came standard with 3.73 rear axle gear."
Etc.
Look as hard as you like, you won't find a "real" '82.