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BIG BLOCK Crate Engine Special ZZ572/620 620 HP 9.6:1 Compression Street Engine Call us toll-free at 1-800-926-4977 ext. 1232 (or 330-792-5258) between 7:30 a.m. and 9 p.m. EST Monday through Friday and 8 a.m. 'til 4 p.m. Saturdays about this exclusive Greenwood Chevy Performance Parts special!  GM’s most powerful Street engine ever produced will make your Street Rod or Muscle Car the envy of the neighborhood. The ZZ572/620 is built around an all-new Gen VI tall deck race block, filled with a forged, 4340 steel, 4.375” stroke crankshaft, shot-peened rods, and forged aluminum pistons. The newly redesigned rectangular port aluminum cylinder heads result in a pump gas friendly 9.6:1 compression ratio. Also included is a .632” lift, hydraulic roller camshaft, roller rockers, dual valve springs, single-plane intake manifold, and an 850cfm Demon carburetor. A GM HEI ignition feeds the ZZ 572 620 horsepower all the electricity it needs to yield 620hp and 650 ft. lbs. of torque!   Horsepower 620 @ 5500 RPM Torque 650 Ft. Lbs. @ 4500 RPM Max Recommended RPM 6000 RPM Compression Ratio 9.6:1 Block Sportsman Tall Deck Bow Tie Gen VI, 10.200” Deck Height Bore 4.560” Stroke 4.375” Crankshaft Forged 4340 steel Connecting Rods Forged 4340 steel, H-beam style, Shot peened Pistons Forged Aluminum, Full Floating Wrist Pin Piston Rings Plasma-moly rings Camshaft Hydraulic roller (Valve lift: .632” I, .632” E; Duration @ .050” 254° I, 264° E) Lifters Hydraulic roller tappet Cylinder Heads Aluminum rectangular port, 118cc combustion chamber Intake Valves 2.25” Stainless steel Exhaust Valves 1.88” Stainless steel Valve Springs Dual valve springs, 1.564” coil dia., 1.800” installed height, 197 Lbs. seat pressure Spring Retainers Hardened chromemoly steel Rocker Arms Aluminum roller rockers, 1.7:1 ratio Push Rods High performance one piece Intake Manifold New! Aluminum tall deck single plane, 4150 series carburetor. Carburetor 850cfm, mechanical secondary Rear Main Seal New! One-piece design Windage Tray New! Screened and louvered Damper High RPM torsional damper Distributor H.E.I. Ignition Timing 36° total advance Spark Plugs R42XLS Fuel 92 Octane Part number #12498793 COMPLETE ENGINE    $13,389.00 Part number #12498792 LONG BLOCK              $11,995.00 Part number #12499190 PARTIAL $7,995.00 * Price subject to change without notice GM PARTS WARRANTY INFORMATION: Due to the nature and intended usage of GM Performance Parts, the parts available on this website and in our walk-in store (except for engines and partial engines) are sold without any express or implied warranty of merchantability or fitness for a particular purpose. The entire risk as to the performance of such parts is with the buyer. Should such parts prove defective following their purchase, the buyer and not the manufacturer, distributor, or retailer, assumes the entire cost of all necessary servicing, repair, damage or loss to property and consequential damage. "Engine and Partial Engine Warranty" under the provisions of the General Motors Dealer Service Parts and Accessories Warranty Section 1.1.3a, engines and partial engines, including partial engines in kits, are warranted against defects in materials and workmanship. This warranty specifically excludes engines and partial engines used in racing or competition or that fail as a result of alteration. These engines and partial engines are not designed or approved by General Motors for marine use. Installation of GM Performance Parts may adversely affect GM New Vehicle Warranty. Please consult your dealer for terms and conditions.   Welcome to Greenwood Chevrolet -Parts and Pro-shop: Looking for GM Performance parts, aftermarket performance parts,  crate engine motors, and intakes. Browse the largest inventory of GM Parts, GM Performance parts, Chevy Parts, engines, crate engines, warranty, performance, restoration parts, partial engines,  performance parts, engine specials, accessories, motors, crate engine specials,  crate engine prices, Chevy crate,  Chevy, crate engine, 350 engine on the web. We can special order, accessories for any make and model of gm vehicle, and much more, shop online, call or stop in and see us. Greenwood HUMMER   Greenwood Hubbard Chevrolet   Cobalt Capitol