Further Details
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- pics are thumbnails-
There is no casting date on the left side of the engine block.
Back of intake manifold has no casting number;  it is on the face under the number 3 exhaust port area.  Finish is rough cast.
Manifold studs appear to be the same length. Note the "C" on one wing of the valver cover wing nut.
Mag post is later type
Crankcase inspection lower door bolt heads are drilled for safety wire.
No date on the transmission cover.
Brake pedal hub appears to have a bright finish under the paint.
Corner bolts at block/transmission cover joint appear to have been removed and replaced.