Van Nuys cars were built with much more attention to detail and in general were far superior cars.........
Well really, about all I can think of is Van Nuys didn't do the cowl inspection stampings, didn't do X codes, and the top of the cowl had the stripe color on the Z's.
Also, most if not all '69's had a chassis broadcat copy placed on top of the gas tank.
That will get us started......
Doug