At this point in time the Chevrolet build records are presumed destroyed so unless your vehicle was exported to Canada there are no official records besides the rare dealership cache and of course the original owners copies. SO if you are lucky to have the POP and dealer invoice your all set.
My Z11 is two weeks earlier 03B And your vin sequence is in line for the production date. Body numbers can be misleading since the number is generated by the central office based on order, and may take weeks for the body number to be released based on options and availability.
What shape is she in? Have you posted over at Team Camaro?