I guess the sketches must have been done post December 69, or Don wouldn't have even known what a cold air hood would look like. I'd bet it was before he saw a Z/28 equipped with one too, or he'd have used the rearward placement for the engine numerals like GM installed the Z/28's 302 badges.
Maybe the Camaro in the sketch IS the gold demo car, have any other 69 Yenko Camaros been documented to have received the demo car's emblem placements?
Ed Hedrick's early X66 car got the crests below the Camaro script, and the 427's on the hood, but the same tail pan treatment as the demo car with the '68 style 427 emblem placed on top of the blue bowtie. But it too has inexplicably shown up in pics with the "standard" staggered crest and 427 tail panel emblem placement. I know at least one 69 Yenko Camaro is documented to have received no Yenko fender crests at all.
I wonder at what point did Yenko develop the "standard" emblem placement we see on most Yenkos today? Was he ultimately responsible for switching the tail pan setup on Hedrick's Yenko sponsored racecar?
It seems every answer just leads me to asking more questions.