Fred & Don requested items that were not a RPO for the car to be installed, and GM agreed and used the COPO process to get it done.
One slight correction, most 68 Yenko's had the 9737 COPO installed(Sports car conversion). Oh and lets not forget the Corvair Stingers...
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GM never backed Fred Gibb back in 1968. The Gibb Novas didn't have crap for warrenty. I fail to understand what is your question??
Yenko wasn't backed by GM with the 67 & 68 transplants.
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