4.120 in. Bore
- Material: Cast iron
- Deck Height: 9.025 in. (standard Chevy)
- Deck Thickness: .600 in. minimum
- Cam Bearings: Standard Chevy
- Camshaft Location: Stock
- Lifter Bores: Indexed (stock .8437 in. bore)
- Bore: 4.120 in. (hone to 4.125 in.)
- Maximum Bore: 4.200 in.
- Cylinder Wall Thickness: .250 in. @ 4.200 in. bore
- Lubrication: Priority main oiling system
- Filtration: Integral mount for spin-on filter
- Oil Pan Rails: Solid stock width (can be clearanced for Strokers)
- Crank Clearance: 4.000 in. stroke (with H-Beam steel rods)
- Main Caps: Billet 4-bolt (7/16 in.) with dowels to handle extreme pressures
- Fuel Pump: OE mount
- Starter: OE mount
- Motor Mounts: Front and side
- Cylinder Head Holes: Blind tapped to prevent leaks
- Cam location is raised .134 in. over the stock Chevy location
- Machined with Big Block Chevy cam journal
- Weight: Approximately 200 lbs.
Small Block Chevy Replacement Blocks with Major Muscle
World Products Motown II Small Block Chevy Cast Iron Blocks are entirely manufactured to QS-9000 specs using only two fixturing operations (no tolerance stacking like factory blocks made on an assembly line). Compared to OE models, World’s Motown II engine blocks contain thicker cylinder walls, and the expanded water jackets help improve cooling. Each engine block includes one-inch thicker bulkheads (to provide ample support of the front and rear mains), bosses for front-feed oil systems, and rear dry-sump scavenging. Solid pan rails (standard width design) ensure proper sealing, and stock-type oil pans can be used.
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.