Lets see here.... for starters, in '81 Waltrip, Yarborough, Petty, and Bobby Allison all drove Buick's...
I'm looking at Tim Richmond's 82 Buick and the rear spoiler bolted to both the top and rear edge of the deck lid.
Winners? In '81, Petty won Daytona in a Buick... DW won at Richmond and Rockingham, Yarborough in Atlanta, DW at Bristol, Petty at Wilkesboro, DW at Darlington.... and on and on and on.
Both 81 and 82 were stellar years for Buicks in Cup.
Quickly running through the numbers in my book, it looks like Buick's last win in Cup was at Wilkesboro in '90 with Brett Bodine driving...