4.120 in. Bore
World Products 084125RC Motown II Cast Iron Block Features:
- 0.134 in. raised cam bore that has been sized to accept a 50 mm roller cam bearing which will allow as much as a 4 in. stroke with 6 in. H-beam rods.
- Bushed and indexed lifter bores sized at OEM (Std. Chevy) diameter provide accurate pushrod alignment and valvetrain stability.
- 350 Chevy diameter (0.2641 in.) billet steel 4 bolt splayed main bearing caps are located by dowel pins and a deep step design to allow for 700 HP plus in naturally aspirated or boosted applications.
- Standard Chevy block deck height of 9.025 in. has been improved with a minimum of .600 in. thickness.
- Siamese design cylinder bores sized at 4.125 in. eliminate the need for steam holes and can be bored to 4.185 in.
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.