Not really.
It depends on the factory options selected. Optional on Z/28's until about April of '69 - the "D80" Spoiler Package was not allways factory installed.
'69 Z28 Trunk Lid Striping:
If the spoiler was installed at the factory:
1. The paint stripes go over the spoiler, and end at the bottom of the spoiler (and therefore not on the back lip of the trunk lid)
2. The Camaro trunk lid emblem was moved forward, up the trunk lid, from station 125.00 to station 121.73, a distance of 3.27 inches.
If the spoiler was installed by the dealer:
1. The stripes were painted on the trunk lid at the factory and thus, without a spoiler, run all the way through to the lip of the lid. The dealer installed spoiler was attached over the factory stripes and then the dealer painted the spoiler to match.
2. The dealer often did not relocate the Camaro emblem.
Additionally, if you check under the trunk lid and measure the 2 spring rods, a factory spoiler car will have 2 different rod diameters. If the spoiler was added after the factory, the 2 spring rods will be both the same diameter.
-Mark.