Here's a thumbnail scan from my parts book, sorry it's crooked. Shows part #9752131, but this is a 1975 book.
Now we need a Buick parts book to compare.
Click to enlarge.
__________________
Rick
69 Chevelle SS396 Silver L78 M21 Post Sedan (Berger Chev.)
69 Chevelle SS396 Black L78 4-speed 4.10 Post Sedan
Don't text and drive.
Somebody's life may depend on it!