My VIN ends on 200594; body number 594 in Van Nuys if I am not mistaken. So, is there a number of demarkation so to speak that makes the body sequence production number special. Obviously 00001 would be special.

 

Looks like you've got the 594th Firebird for 1991. Usually the first 50 to 80 cars are built as pilot cars for new paint schemes, options and what not. These cars never get realesed to dealers.
They are for R&D then get crushed.
The earliest production sequence number I've seen is EN100084
Which happened to be the 84th Camaro in 1984 out of Norwood.