Slant 6 engine number identification.

Alaskan_TA said

That is the engines serial number, it is not to be confused with the partial VIN.

Look on the block under the rear spark plug for another machined pad with more numbers.

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I had a question in regards to engine numbers too. I have a slant six I'm going to build up that was pulled from a 67 dart...not sure if it's the original engine. Casting numbers are:
2463430
which says it is from 66 which could make sense. The pad stamp near the alternator reads:
CC 225 06 15
wondering if its been rebuilt and that is a new stamp - it has a partial 'independent cross' logo next to it too?
And the head on it is painted a aqua blue - not the surf blue of the seventies but more of a green blue.