The "867" is an aluminum 153 tooth Bellhousing.
This Chevrolet Clutch housing is unique in that the clutch fork ball stud is lowered, as is the fork opening, which is at approximately 8 o'clock, making it similar to the 63-67 Chevy II bells with their 7 o'clock
location.
Front View
Notice the squared off and lowered clutch fork opening.
Side View
Passenger side view is virtually the same as most 153 tooth, with an almost straight edge.
Top View
This example has the GM logo.
Driver's Side View
This view shows the main difference between this and other Chevrolet bells.
Notice the two taped bosses for attaching a hydraulic slave cylinder.
Part #
The part number is located on the passenger side upper mounting tab.
Foundry Mark?
I don't know what this symbol is but it reminds me of other aluminum GM parts with marks from out sourced foundries.
Inside View
Notice the lowered ball stud location.
Close-up
The alignment between the lowered ball stud and 8 o'clock fork hole is evident in this picture.
Disclaimer:
Factory correct applications are your responsibility.
GM made part and part # changes with no rhyme but a reason (no production interruptions at any cost).
Application charts are for replacement parts that were available at the time of parts book printing.
My observations come from the parts I have in my collection or other reliable sources. Your parts may differ.
If Factory correctness is your goal, do more research, join car clubs and forums and buy an assembly manual if one is available for your Project Car (you wont be sorry).
This is a fun and interesting part of the hobby!