This would be August 13th at 4PM 1973?

I mean, the VIN on the sticker would indicate it’s a ‘73. But the build date would indicate it was probably built on the 1st day of ‘74 model year production. Late order held over after the re-tool?

Of course, that’s just a sticker. Not saying I don’t believe you, but seeing the other VIN stampings and other options on the car would go a long way. The ‘74 would have been a shock mounted front bumper for the early production, ‘73 would have a standard mount bumper.