They do run in groups but I have seen large deviations (10 days +) from the outboards to the primary. The carb dates will precede the engine assembly date (EAD) not the shipping date. We can estimate the actual production date of your car based upon the BIW number. The VIN tells us nothing about the date of production for the A12 cars.

Dave C and I work closely together at the A12 Forum.

D