This is a bell housing for a V8 Chevy and truck 4 speed (465 Muncie). It is in Great condition with no cracks or repairs. The casting number on the bellhousing is  15562386. I was told this fits 88-91 Chevy and GMC trucks . It can be used with the 1987 and earlier SM465 transmissions, cast iron top cover type. This is set up for the external slave cylinder. Commonly used on Jeeps or other trucks with drivetrain swaps. Will bolt to GM 4.3L V6 engines as well as SBCs such as the 5.7L, etc. Will also boltup to7.4L and GM diesel engines. Looks similar to the early GM NV4500 bellhousing but the 4 bolt pattern is different.