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QUALITY STRENGTH PERFORMANCE SINCE 1981<br />
QUICK INFO >>><br />
Designed to be the strongest, most durable and<br />
easiest to build Aluminum big block available.<br />
The ultimate choice for competition engines.<br />
Based on the Chevrolet big block V8 design,<br />
these Aluminum blocks feature extra<br />
strengthening in critical areas, increased<br />
displacement capacity, true priority main<br />
oiling and precision CNC machining.<br />
Conventional configuration that retains<br />
all production dimensions for compatibility<br />
with standard components. Advanced<br />
engineering makes <strong>Dart</strong> Aluminum big<br />
blocks the choice for serious competition.<br />
FEATURES<br />
BIG M - ALUMINUM<br />
BIG BLOCK CHEVY<br />
CAST ALUMINUM ENGINE BLOCKS<br />
• Standard 9.800” or 10.200” tall deck heights available for stroker engines.<br />
• 4.250”, 4.500” or 4.600” bore sizes standard.<br />
• Ductile Iron sleeves with extra thick cylinder walls promote excellent ring seal.<br />
• Reinforcing ribs strengthen the lifter valley and bell housing flange.<br />
• Inboard valley head stud bosses improve head gasket sealing.<br />
• Priority main oiling system delivers oil directly to the crankshaft bearings to enhance<br />
reliability at high engine speeds.<br />
• Steel 4-Bolt main caps or Ductile Iron and optional Aluminum caps. Splayed outer bolts<br />
for extra strength.<br />
• Dual oil pan bolt patterns fit standard and notched oil pans.<br />
• Parts kit included (PN 32000006 - see page 118).<br />
PART NO. CAPS MAINS CAM DECK BORE<br />
31274344 Ductile Std. Std. 9.800" 4.250"<br />
31274354 Ductile Std. Std. 10.200" 4.250"<br />
31274444 Ductile Std. Std. 9.800" 4.500"<br />
31274454 Ductile Std. Std. 10.200" 4.500"<br />
31274644 Ductile Std. Std. 9.800" 4.600"<br />
31274654 Ductile Std. Std 10.200" 4.600"<br />
31264344 Steel Std. Std. 9.800" 4.250"<br />
31264354 Steel Std. Std. 10.200" 4.250"<br />
31264444 Steel Std. Std. 9.800" 4.500"<br />
31264454 Steel Std. Std. 10.200" 4.500"<br />
31264644 Steel Std. Std. 9.800" 4.600"<br />
31264654 Steel Std. Std. 10.200" 4.600"<br />
<strong>Dart</strong> blocks can be special ordered with a wide<br />
array of special machining options to suit your<br />
specific requirements.<br />
BIG M & SPORTSMAN SPECS<br />
Material:<br />
RMR Cast<br />
Aluminum Alloy<br />
Deck Height: 9.800” to 10.200”<br />
Cylinder Bores: 4.250” to 4.600”<br />
Main Bearings: Standard<br />
Main Caps: Ductile or Steel<br />
Cam Location: Standard<br />
Lifter Bores: .842”<br />
Freeze Plugs: Screw-in<br />
Rear Seal: 2-Piece<br />
Weight:<br />
140-160 lbs.<br />
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET<br />
Not intended for sale or use with pollution controlled vehicles.<br />
248.362.1188 / DARTHEADS.COM Connect with us socially, search: DART MACHINERY<br />
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