Re: Yenko paperwork for creating the COPO option?
I'm not sure when he first contacted GM, but he placed the first order for 9561's in November/December of '68. I would imagine he was discussing the 9561 option substantially before 11/68, as the labor intensive conversions were not especially cost effective for the '68's - Harrell had performed about 1/2 of the conversions in '67, but not sure he performed any of the '68's.
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Marlin
70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride)
69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride)
67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
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