World Products 084181 - Cast Iron Motown/LS Engine Block Chevy Small Block 350 Mains, 4.125 Bore, Billet Caps. Accepts LS style heads
World Products has developed a refined version of its popular MOTOWN block in the form of the MOTOWN II, and now offers it in over two dozen iterations for small block Chevrolet applications. The MOTOWN II block can be bored to 4.200" and is clearances for 4.000" strokes using a steel rod. The oiling system features an internal boss for front and rear oil feed. The rear main cap has provisions for a wet sump pump. The valley has cross-feed lines between the left and right lifter oil galleys. Like all World Products blocks and heads, the Motown II is 100% American made. World's new digital inspection equipment and quality verification procedures ensure dimensions accuracy and mean you can be assured of total quality and superior performance.
TECHNICAL SPECS:
Material: High-Density Cast iron
Rear Main Seal: 2-piece Small Block Chevy
Deck Height: 9.240 in. (standard LS)
Deck Thickness: .600 in. minimum
Cam Bearings: 55mm Babbit
Camshaft Location: Raised .134 in.
Lifter Bores: Bushed & Indexed .842" LS
Bore Spacing: 4.400 in.
Bore: 4.120 in. (hone to 4.125 in.)
Maximum Bore: 4.200 in.
Cylinder Wall Thickness: .250 in. @ 4.200 in. bore
Priority main oiling system
Oil pan rails: Solid stock width (can be clearanced for Strokers)
Crank clearance: 4.000 in. stroke with H-Beam steel rods
Main caps: Nodular iron 4-bolt main caps using ARP 7/16 in. hardware with dowels
Main bearings: Standard 350 Small Block Chevy
Driver Side Dipstick
Standard Small Block Chevy OE fuel pump mount
Standard Small Block Chevy OE starter provision
OE Small Block Chevy integral spin-on oil filter mount
Oil System Features: Integral boss for front feed, boss for rear scavenge, rear main cap has provisions for wet sump pump
Accepts Small Block Chevy style motor mounts
LS-style reverse flow cooling with expanded water jackets for enhanced cooling
Cylinder head holes are blind tapped to prevent leaks
Weighs approximately 200 lbs.
Notes:
Water return kit 703849-K is required on the heads for coolant return flow to the radiator
Adapter 703848-K allows SBC accessory brackets to fit
Valley plate 703844-I for LS fuel injected intakes using crank trigger ignition
Valley plate 703844 for LS carbureted intakes using a distributor
Block Dowel/Plug Kit: BMP 703890B-1K
Oil Restrictors: Standard 1/8" NPT plugs (drill to required size)
Rear Seal: FEL2909
