Pretty sure a 4.00 stroke will easily get you where you want to go. My 408 went 9.70’s with Edelbrock heads at 2860 pounds with a powerglide in my duster and 10.08 in the summer heat at 3200 pounds in my sons Duster with a 727 transmission. His current stock crank 360 has gone 6.54 which should be 10.20’-10.30’s.