Cast iron block Nodular iron crankshaft Powdered metal connecting rods Cast aluminum pistons 9.0 1 nominal compression ratio Hydraulic roller camshaft .473 intake .473 exhaust lift, 215 degree intake 223 degree exhaust duration at 0.050 in. Cast iron cylinder heads with 64cc chambers Valve size 1.940 in. intake 1.500 in. exhaust