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i was told the tall spoiler didn't replace the short spoiler till about april or mid of 1971.
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COPO 9796 became avalible on April 26, 1970. but due to quality problems production did not get going until late May.
At the end of the 1970 SCCA season, Chrvrolet got out of SCCA Trans-Am Racing but liked the appearance of the old COPO Spoiler Package, so it then then became RPO D-80 and optional on any 1971 Camaro.
In 70 the Short 1 pc spoiler was RPO D-80.
The short 1 pc spoiler was standard with Z-28 in 1971.
For '71 RPO D-80 was an improved version of the last varient of old COPO 9697 package and consisted of both the front and real spoilers and was vastly improved in fit and appearance.
By 72 the short 1 pc spoiler was disco, and RPO D-80 was the only spoiler you could get.
Hope this helps. Please post pictures of your car. We would like to see it.
Phil
