Bill my dakota is not making near as much power as your duster. But I ran my best time last year going from a 28x10.5x15 MT pro bracket radials. Which on my dakota woukd just spin most of the way through first gear. I think 7.15 was my best 1/8 pass. They had a close to half tread when I put them on. The last race of last year I found a guy selling a brand-new never raced on MT 295/65/15 ET Street R Radial tires. With the 295 my best pass last year was 7.12 in the 1/8.