Quote from a conversation @ Yenko net 7/2006
I believe that all 1970 Z/28's came standard with the one piece spoiler and after late April, early May of 1970 the three piece COPO spoiler became available but only as a special dealer order, not standard equipment. Phil??
Yes the dealers that knew about it could order it. How that all came together was through the zone reps as they were trying to spread them out to show the SCCA they were in production. Dealers within 300 miles of an SCCA race event were a priority for delivery.........................................
Hello to ALL my 2nd Gen friends, This COPO spoiler end piece issue is obviously a very obscure, rare subject. Phil B. in my thinking is the most known 70 COPO authority in the world.
I have a 70 RS/Z28 in original condition with the 3 piece spoiler, the caps do not have the revised part # and was built 04C, is that a little too early? Looked for the build sheet but it's gone forever. I was going to do some title searching if the date is not too early, maybe get lucky and find original owner.
You are right. A little too early for production. The April 26 date is the order date.
NOR Production actually ramped up in mid May. There is an exception to the April 26th date, however it is dependent on where your car originally came from. Is it by chance a Texas car??
As the 1969 ZL-1 option was pushed through as a COPO to get around the approval laden RPO system, in order to dominate Drag racing, the Special Race spoiler package for the 1970 Camaro was designed to allow Chevrolet to continue to dominate the SCCA Trans-AM race series.
Vince Piggins was involved from the start.
After testing of the 1970 Camaro SCCA race cars with the standard issue “short” RPO D-80 spoiler tests showed significant Lift at the rear of the Camaro at speeds in excess of 120MPH.
Piggins got permission to "Borrow" the Firebird center section and had AO-Smith Corp tool up the individualized end caps. The result was significant.
With the short spoiler there was 112 pounds of lift. With the new COPO 9796 High spoiler at the rear there was 168 pounds of down force-a critical 280 pound difference in a Camaro equipped for Trans-AM- A significant improvement for the Camaro in the areas of stability and cornering traction at speed.
In order to comply with SCCA Race rules a limited number of these cars were built in late April 1970, and starting in June - also included the front spoiler as part of this package.
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.
Chuck S 07E build
The cars were available in late April but were still a special order.