Thisis the last Cadillac with a V-16 engine. It looks very much like the 1939 V-16 but had a new instrument panel, taillights, and bumpers. New for 1940 was the introduction of sealed beam headlights and directional signal lights.
Serial numbers were located on the left front side bar, opposite the steering gear
Starting Number was the same as the engine number
Ending Number was the same as the engine number
Engine numbers were on the upper rear corner of the left cylinder block parallel to the cylinder head