My Duster is a stock block stroked to 393 inches. Ran 9.63 last weekend at 139. It weighs 3230 with me. This combo has been together (freshened every other year) for over 14 years. I don't race a dyno but on the calculators that some of you have posted up, I'm over the requested HP. http://www.cardomain.com/ride/2468359
