GM Performance Crate Engine, Crate Engine, HT383, Chevy, 323 hp, Vortec Heads, Each (PART #GMP-19332529)

Specially tuned for torque, the all-new HT383 delivers great power in a small block package for your truck or street rod. These GM Performance 383 c.i.d. 4-bolt main, cast iron engines, have approximately 9.1: 1 compression with 323 hp at 4,200 rpm, and 444 ft.-lbs. of torque at 3,000 rpm. Included with these engines are forged 4340 steel externally balanced crankshafts, 5.7 in. powdered metal connecting rods, hypereutectic dished top pistons with offset pins. Hydraulic billet steel roller camshafts are installed with .431 in. intake lift, .451 in. exhaust lift and duration at .050 in. for intake is 196 and 206 for exhaust with lobe centerline at 109 degrees. Stamped steel self aligning rocker arms with 1.5:1 ratios are installed on the Vortec cylinder heads. All aluminum dual plane dual flange intakes with external EGR provisions, cast iron long leg, standard "V" belt rotation water pumps with 1979-86 power steering pump boss. Valve measurements are 1.940 in. for intake and 1.50 in. for exhaust. Additional items installed with these crate engines are 8 in. harmonic balancers, 12 3/4 automatic flexplates, 4-qt. oil pans with windage trays, painted valve covers with oil cap, grommets, provisions for PCV and breathers. Composite front timing covers, brass freeze plugs, engine oil dipstick and tube for passenger side location. Spark plugs come installed along with fuel pump block-off plates and Engine lift tabs for easy installs. These HT383 are ideal replacements for any 1978 and older carbureted engines or off-road applications.