your lookin for a standard flat 3rd gen bird spoiler, 82-84 trans ams got them standard, 82-84 firebirds got them as an option, 85-92 base firebirds also got them standard i believe..(you dont want 87-90 though bc they have the 3rd brake light built into them sorta)
look like this (my old 84 firebird..
) should be really easy to find and not cost much at all..i'd say tops..$40
