in 1969 the ZL1 engine was not listed in any GM promotional, advertising, or sales training material. it was introduced for the singular reason of having the option available to make it legal for NHRA stock class racing. which at the time was the biggest "win on sunday, sell on monday" thing going for the big 3.
same thing for the JL8 disc brakes, it is a sure shot that more people woudl have been interested if they had known about the option. JL8 only came into existance so that the SCCA would approve 4wheel power disc brakes on the camaro in trans am competition.
GM will make every available option very visible to the public as they have done for all their cars in the last 20 years. what ever performance GM chooses to allow in the car will sell, the camaro has the market presence in name alone to carry the sales of specialty options.
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