found 2 340's

Alaskan_TA said
If you find a 1972 casting with a 1971 VIN, it has been re-stamped since that would not be possible from the factory.

1969, 70 or 71 casting is possible for a '71 car, but never a '72 casting in a '71.

You're right.
My bad.
I meant late '70 or early to mid year '71 as an actual casting date.