Parts build dates versus car build date

[CDNL-78]

Been keepin my eye out for some misc parts for my Nova. Build date for the car is Jan 28/69. I'm looking for a distributor (1111499) and a 4346 holley. What would be acceptable dates for both of these item to match the build date of the car?? A couple weeks before, a month. I know the engine and heads are very late Dec 68, and very early Jan 69. So should I be looking for some stuff that is dated close to that, or are these parts I'm looking for dated earlier or later then the block and heads. What are other L-78 Novas dated like?? Thanks as always for your input guys.