[Musclecarkid]

It is possible and here is proof. My 70 Chevelle convertible has a Trim Tag Build of 06A, June first week. The rear cast date is May 22, 1970 and was assembled on June 8, 1970. (0608 B1). The rear was built in Buffalo NY then shipped to Baltimore for installation on the assembly line. This proves in some cases the built date stamped on the trim tag was a projected date, not the actual time the car was completed. My car was probably built the second week of June 1970, which should be 06B. There could be a few reasons to have a rear dated after the build date on the trim tag. One being a Strike or plant shutdown, which would leave cars stopped on the line, or late year built cars when production was slower.