Understanding Vin #'s

[Canuck]

Asside from decoding a vin number I am trying to understand the Vin sequence and assignment of the last 6 digits of a vin. Using a 1968 Chevrolet as an example, the vin will show car line,body style,engine type,year,plant and then the 6 digit sequence. Is the sequence number unigue to the body style and plant or would it represent the entire car line? To pose the question another way, could a Chevelle built in Atlanta have the exact numbering,except for plant as a similar car built at Baltimore? Could the same Chevelle built in Atlanta have the exact same numbering as an Impala,except body style or group built at the same plant? Just trying to understand the assigment of the sequence number? Using 1969 Z28 as an example is the only difference in a Camaro's Vin number going to be the plant and there is no duplication in the sequence number or are those assigned according to plant.

Paul