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350 Chev SB World Motown II Block 3.990"

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Your Price:
$3,689.00 (excluding tax) (You save $1,200.00)

Product Description

084110 MOTOWN II bare block, 3.990" bore, 350 mains, billet steel splayed 4-bolt caps

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 boasts 152 fluid ounces of coolant per side and has demonstrated stability lauded by racers and professional engine builders alike. A MOTOWN block won the inaugural Engine Masters Challenge and it was worth about 20 horsepower over others, thanks to its outstanding design and overall stability.

MOTOWN II blocks are offered both bare and prepped. The prepped blocks come decked, plate honed, deburred, hot tanked, and with freeze plugs, cam bearings and dowel pins installed. Prepping also includes painting of the block inside and out, machined surfaces are protected with a rust prohibitor, and finally wrapped.

GET IT PREPPED! For the enthusiast who is planning to assemble an engine in their home garage, getting the block in a RACE-PREPPED state is a no-brainer. Our experienced staff performs important basic operations like: • Deck milling +/- .0025” • Main journal honing +/- .0004” • Cylinder bore plate honing .001” oversized +/- .0005” • Lifter bore honing +/- .0005” • Block hot tanking • Cam bearing installation • Freeze plug installation • Dowel pin and pipe plug installation • Block deburring • Machined surfaces sprayed with rust inhibitor • Protective wrapping

More and more professional engine builders are also recognizing the benefits of ordering race-prepped blocks instead of endeavoring to perform these many tasks themselves. Many have realized that their time can be better spent doing critical assembly work such as degreeing in camshafts and setting up the valve train. By employing race-prepped World blocks the shop’s through-put can be accelerated, and there are demonstrated savings in terms of personnel, shop equipment, space and cash flow. Whether you're an enthusiast or engine builder, save time and money


Material: High Density Iron
Deck Height: 9.025" (standard Chevrolet)
Deck Thickness: .600" minimum
Cam Bearings: Standard Chevrolet small block set
Main Bearings: Standard Chevrolet (350 style)
Camshaft Location: Stock
Lifter Bores: Indexed (stock .843" bore)
Bore: 3.990" (hone to 4.000") or 4.115" (hone to 4.125")
Maximum Bore: 4.155"
Cylinder Wall Thickness: Approx. .075" @ 4.155" bore
Water Jackets: Expanded for better cooling
Lubrication: Priority main oiling system
Oil System Features: Integral boss for front feed, boss for rear scavenge rear main cap has provisions for wet sump pump, drilled for dry sump valley scavenge lines, cross-feed lines between left and right lifter oil galleys
Filtration: Integral mount for spin-on filter
Oil Pan Rails: Solid (stock width) can be clearanced for strokers
Crank Clearance: 4.000" stroke (H-beam steel rods) (sleeves may need notching)
Main Caps: Splayed billet steel
Mounts: OEM starter and oil filter mounts
Block: Side ribs for extra strength & cooling - cross-ribs in valley
Motor Mounts: Dual (front and side)
Cylinder Head Holes: Blind tapped to prevent leaks
Weight: Approximately 100 lbs. with sleeves