Got in the SPEC Clutch for the 400 inch SBC. It consists of a steel spec pressure plate, sprung 6 puck clutch, aluminum flywheel, and all bearings and bolts. Total weight of the package is 36 pounds which isn't that bad. This clutch will handle 650 foot pounds of torque, which will be perfect. Also since we have a sprung hub, the chatter won't be that bad.