273 engine identification.

Interesting this came up. A friend has a TA with a block casting date within a week of assembly but..... the 340 TA/AAR blocks were special to the cars and aparently cast all at once. The cars were assembled all at once as well So it's very possible that one of the last engines got put in one of the first cars. From what I understand, The warehouses didn't rotate their inventory so one of the earlier engines could vary well get used in a mid to late year made car. Crazy stuff.