I kinda like the prepurle 57.
Question: Wasn't Yenko a licensed manufacturer of cars? Starting with the corvairs that he raced didn't he have manufacturing status? That being why his cars were called Yenko stinger corvairs, Yenko camaros, Yenko novas, etc. Is it possible that this status played a part in where cars were slotted, and documented to? ie:converted, bought for conversion, slated to convert, but not converted, or dealership cars.