[Cameo White]

OK, I've seen a lot of information that says there are two different distributors for the 69 H/O.

1111973, the early distributor; reportedly very rare and very pricey.
1111989, also rare/pricey but less so. Also reportedly used on the W-32.

Here is my question. Did GM make a running change on the line at some time, so that certain early build dates should have the 973 and other later ones the 989? If so, around what date did the conversion occur? If not, is the 989 simply the replacement number that GM decided to go with since they were using it elsewhere?

Somewhere in the research information on the 69 H/O I got from the H/O club, there is also a handwritten note saying Doc Watson mentioned a few also got the 1111979. Not surprising I guess, since it was used on the 1970 W-30 and shows up in some later GM parts catalogs of the era (such as my 1975 edition) as a correct replacement part number for the 69 H/O.

Just trying to figure out if I should be on the lookout for some more hardware.

Thanks for your help.