[rotorwrench]

Ford would cast blocks in lots which were fairly large lots. The castings would come out of the sand removal process and get stacked outside until they were moved to the machining center. I remember seeing photos of Charles Sorensen and others next to large quantities of blocks that were stacked & setting in rows in between processes so I know they set out for a while but I doubt if it was very long.

Racers are the only ones I know of that use a "seasoning" process to normalize cast blocks. Manufacturers rarely had the time to waist on parts setting around.