Absolutely correct , '67 hipo with A/C only . As stated by 67350#1242, The '67 a/c pulley would not fit in the C50E dampner so a new outer ring was made to allow it. Since this was an alteration to a production part but a very small quantity , the casting number was removed and re stamped. Plans were in place for a "hi po 302" for '68 ( dropped for the also dropped 302 street tunnel port) manufacturing changed the blueprint to effect the changes. The casting number was changed to C8ZE to reflect the updated part. Since neither of the intended use engines were produced , the dampners were sold over the counter.
Randy