[TimG]

I STILL find it hard to believe that a natural order of preselection occurred back then!

You're correct, it was a crude form of inventory, crude as it was, they didn't put an engine cast in 1968 in a Corvette that was built in 1967. I think that you'd agree that the parts of a car have to be built before the car was built and sold to a customer. That's what they look at, that's what they judge.