my 69 came with 2.56 stock rear....it was a 350...but with the 400 its great hwy cruiser...getting a whopping 14 mpg! LOL, so Im glad I have the 2.56....
I'd be estatic with 14 mpg
1968 400 Coupe, verdoro green, black vinyl top, auto 1969 GTO Judge coupe, Carousel Red, manual 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver), Fire Red, white top, auto 1972 Buick GS Stage 1, Royal Blue, black vinyl top, auto