[Mr70]

I don't think it's a Red Flag if it wasn't built at Baltimore.
I know of a few solid lifter 1970 Chevelles,that were shipped to Canada built at Van Nuys,and Kansas Plants.
George Z.says 231 is documented through their records.

Code #45 Green Mist is shown on his paperwork as being the original color,as is the L-78 engine.
Why do you bet it was a 350HP originally,besides the incorrect tach?Canadian Docs are pretty tough to beat,and a 4:10 wasn't possible on an L-34.
I'm not disputing it's heritage at all,just it's advertised condition.