first glance i thought it was parts of a ford cruiseOmatic, but i never seen one with a large keyway in the output shaft. only seen them splined. was mixed in with a bunch of pre-war packard V12 stuff. is it packard?
It's an output shaft & extension housing from an early sixties Lincoln cast iron trans, I think it was called a PGA? They also used a C6 in the Lincoln's with that Big Assed 3 spline output shaft.