I ran a bunch of 10.60 in the 1/4 with a 93 pump gas 440 in a 3520 pounds 73 dart swinger. It had 4.10 gears and 28 inch ET street Tires. You could drive it any wear you wanted. It had a 9.5 inch converter that stalled around 4200. But like everybody is saying I would recommend in getting a set of aluminum heads. Mine had a pretty much stock Indy EZ head