Figured I better put this in a new post:
I just realized tonight the engine in my 1963 Dart wagon may not be the original one after all. Check out the photo and notice the engine casting number.



Now look at this:



Any chance this is wrong and this series was cast earlier in '63? If not, which numbers somewhere else on the vehicle should match the engine block castings? Somewhere on the VIN or other?

The "430" casting number is correct for 1963.
What does the deck stamping say?
DD

Here's the deck stampings Doc. What do they mean?

The deck stamping (" T ") is also correct for 1963
I would say that this is the original engine for your 63 vehicle.
DD
http://slantsix.org/forum/viewtopic.php?p=288357

Thanks Doc! Glad to know this.