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Billet Mains
Small Block Chevy Oiling System Improvements
World Products 084125RC-904 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 0.904 in. provide accurate pushrod alignment and valvetrain stability.
- 350 Chevy diameter (0.2441 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.









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