Julian Date For 9204 Booster

[69novamanrick]

I have a 1969 Nova built 05C, the 3rd week of May, in Willow Run Michigan, and I need to know what the best Julian calendar date would be for a 9204 Brake Booster. What is the correct back figure, as far as how far back from the build code, would be the correct Julian Calendar Date, for the 9204 booster for this car? Would I be looking for a 99 or a 121 Julian Calendar Date, or something further back, or something closer to the Build Code of the 05C? I just need the rule of thumb or what is correct so I can find what I need for this car. Thanks everyone!