70 340 Block

Most plants assigned VIN numbers in body type 'series', so the 1970 Valiants & Dusters would be in a series, Barracudas / Cudas in another series & Challengers in their own series too.

So if I have a series on file & a block or transmission hits withing that series I can answer questions like yours.

When the cars were actually made though, they were all mixed up on the lines & built out of VIN order all the time.