GM Factory original Aluminum Chevrolet bell housing casting # 3872444, 11 inches. This bell housing is a rare one with only use in 1966 Chevrolet Vette 427 425, 450HP and early 67 BB Vette as well 66 Chevelle SS 396 L-34 and early 67 Chevelle, Beaumont Big Block only . It is very clean condition with original finish unfortunately the previous owner use a floor jack to jack it up and cracked the bottom of it you can see that in the last two pictures, was in storage for a long time removed from 1966 Chevelle L34 car $250.