Let's say we have a 69 Z28 that has cowl code body build date of 4 C and was built on the tail end of that week and the brake booster is dated one day into the following week. Would this be correct? Was the Brake Booster stamped at the assembly line as it was put on the car or was it stamped in a different location were the brake booster was made?
Remember that the build date code on the cowl tag is when the body started in the Body Shop, and it took a couple of days for it to get to Final Assembly on the Chevrolet side of the plant where the booster was installed. The booster was date-stamped at Delco-Moraine where it was made.