IIRC, which I probably don't, the 1969 Z/28 was purpose built for the SCCA Trans-Am series.
Chevy produced the high revving 302 with the expectation that before the car ever hit the racetrack it would be replaced with a blueprinted and bored 0.30 over, creating a 305, which was the limit on engine size.. Not one of these cars were ever sold to the general public.
And endless number of chassis modifications allowed the Camaro to kick the Mustang's ass.
Here is a late '90s Camaro built specifically for the series and only sold to SCCA Pro licensed drivers.
Thinner sheet metal and lighter glass, larger wheels and tires, heavier frame to keep the center of gravity low. Only 200 were built to meet the SCCA definition of a street car and probably less than 10 survive.
You have a unique Camaro.
You wil probably have to visit a race track to find the leaded race fuel you need to spin that motor which is now ~$100/gallon.