DaveBP,
As asked above, what year and engine?
Carl.
Many people use the term "bell housing" but that term was not used by GM in regards to 47-55st trucks - the term "clutch housing" is what GM used in Shop Manuals and in the Master Parts Catalog.
A new/novice member who reads "bell housing" here but reads "clutch housing" in documentation would have difficulty understanding what is being referred to.
As a further confusion, the term "flywheel housing" was the term sometimes used in early pre stovebolt-six years Shop Manuals.
I had not noticed what GM called that part. The complex English language often calls for clarification during dialog. Since I know this part as a bell housing, and the OP knows it as a clutch housing, it would seem to me that it would be helpful to him and I to make sure that we are talking about the same part. My apologies to ALL of the members (new/novice or otherwise) confused by my misuse of the term bell housing.
Carl