Found A-833 Big Bock bellhousing ....Anything special?

Started going through the boxes of parts that came with the 68 Cuda vert.
Found the bellhousing with a # of 2892513.
Shows it to be a 70-71 B/RB / Hemi big block housing.

Just wondering if this is a common part or is hard to come by.
The vert just keeps on giving....theres 3 or 4 shifters I still have to ID.:cheers: