I never saw that either...cool!
around that time I took my Chevelle to a car show at the new Yenko building on rt19,they put myself and others inside the service bay.
behind my car on a bench was a big box with a complete Yenko turbo kit inside.
thought about how easy it would have been in those days to just kinda slide it across and into my trunk..lol.
if you have ever seen the pic with a yellow Yenko Chevelle parked on a trailer under the new sign I believe it was taken that day.