What was the quickest car (completely stock) in 1969?

[FTC]

I remember as a teen in the mid to late 70s, a Hot Rod or Car Craft magazine testing stock, as sold from the dealer, muscle cars to see what was the fastest in the 1/4 mile. Of course, who knows what's done internally to some cars but seeing these examples were all under 10 years old, and had to have stock exhaust, stock tires, and appear stock under the hood,......the top dog in that test was an LS6 Chevelle SS with a 13.1 quarter mile.