anyone know the part# for a SB truck bellhousing with the A833OD 4 speed trans? has the large 5" retainer hole.

all of my bells with large retainer hole are for a NP435. I have a 72 B-body bell for the a833 4 speed but it has a smaller retainer hole.(last resort is to find a 833 4 speed with small retainer but they are crazy $ it seems)

I looked into a retainer/bearing swap but the large retainer bolt spacing seems to be a no go. as well as cutting retainer down/open bell hole up = no go.

maybe a bell from a 74-76 v8 car? A-body/F-body with the A833OD 4 speeds?

TIA