I've got a Comp XE256H cam. You couldn't ask for a more torquey cam, you'll make more torque with the larger 256 duration than the 250. The 250 is more of a 283 cam. I strongly suggest you do more to raise your compression ratio. I used Vortec heads to net me 9.26:1. In a 4000 lb truck with 3.07 gears, 29.6" tires, and a stock converter I ran a 15.37 and 90.5 mph. That was while shifting 800-1000 rpm short of redline, too. With 3.5 or 3.73 gears and valve springs (to give me the confidence to rev to 5500), I feel the truck would run mid-14's. Heck, I'm crossing the finish line in 2nd gear and I've got a 3rd one just itching to go.