Casting date versus assy date curiosity

[CamarosRus]

A seller on the internet tells me about a Big Block (1970) Automatic T-400 L-78 short block.....Deck info T0601CTY Vin on Deck 10W360848 (W = Nova correct?) this is on a "272" Block cast E-1-9 ....... Anything is possible but a June 1970 Big Block should have been on a 854 Block ????? and whatda think of the difference between May 69 casting and June 1970 assy ??? .....How might this be explained ???
Thanks, Chuck (I did not see any of the above with my own eyes)

[TimG]

A May 69 casting date on a block assembled in June of 70 would be difficult to justify. It could happen, I just can not think of many reasons that a bare blodk would sit around that long.
Do you think that it is a May 69 casting with a June 69 assembly? This would be a perfect time spread and they could very likley be building engines for 1970 production in June of 1970.

[CamarosRus]

I understand your idea that the engine block was cast in May of 69 and assembled in June 69 .... as a early NOVA CTY L-78/T-400 engine....but would somebody in the know say something about that "W"(Nova) vin # ....sounds too HIGH to have a EARLY engine........??????????

[Allen]

For what it's worth, my '70 SS 396/350hp has a build date in the Sept/Oct '69 timeframe. My vin is a 10W144xxx. The 10W3xxxxx definately is a later production. I've also had some '70's built in June and they were around that numbering sequence.