a 496 gen-6 bbc all new parts only block and head castings not.    4 bolt main block eagle crank and rods , forged pistons balanced assy. hyd.roller cam oval port cyl. heads bowl hogged and opened up for bigger valves crane springs and retainers manley stainless valves  air gap intake . stainless fasteners after the sale we will dyno this motor with your carb and ign.