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CHAMPIONSHIP ENGINE COMPONENTS<br />
MADE IN THE USA<br />
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET<br />
QUICK INFO >>><br />
Dart re-engineered the big block, incorporating the<br />
most requested upgrades and special modifications<br />
into the Big M PRO blocks.<br />
With deck heights from 9.600” to 11.100”, a +.600” raised<br />
cam location, spread oil pan rails and bore sizes up to<br />
4.600”, the Big M PRO gives you the versatility to build a<br />
wide variety of engine combinations.<br />
FEATURES<br />
• Deck Options from 9.600” to 11.100” or custom heights.<br />
• Raised cam location +.600” clears stroker crankshafts.<br />
• Oil pan rails are spread .750”.<br />
• Accepts crankshaft strokes up to 5.000 inch for large displacement applications<br />
with clearancing.<br />
• Four valley head stud bosses prevent head gasket failures with high compression<br />
ratios and/or nitrous oxide. Slotted bosses allow the use of studs instead of<br />
difficult to install bolts.<br />
• True priority main oiling directs oil to the main bearings before the lifters for<br />
reliability at high RPM. Stepped main oil gallery ensures uniform oil supply for<br />
all five main bearings.<br />
• Oil crossovers located in the valley simplify restricting oil flow to the top end and<br />
deliver maximum oil volume to the main bearings ensuring reliable lubrication<br />
for the lifters and pushrods on both cylinder banks.<br />
• Steel 4-bolt main bearing caps are manufactured in-house by Dart to ensure<br />
quality and compatibility with the block. Three center caps have splayed outer<br />
bolts that anchor the caps to the strongest part of the casting, front and rear<br />
caps have vertical bolts for oil pan clearance.<br />
• Parts kit included (PN 32000005 - see page 118).<br />
BIG M PRO - IRON<br />
PART NO. CAPS LIFTERS CAM LOC. CAM DECK BORE<br />
31283435 Steel .904" +.600" 2.125" 9.600" 4.500"<br />
31283635 Steel .904" +.600" 2.125" 9.600" 4.600"<br />
31283445 Steel .904" +.600" 2.125" 9.800" 4.500"<br />
31283645 Steel .904" +.600" 2.125" 9.800" 4.600"<br />
31283465 Steel .904" +.600" 2.125" 10.600" 4.500"<br />
31283665 Steel .904" +.600" 2.125" 10.600" 4.600"<br />
31283475 Steel .904" +.600" 2.125" 11.100" 4.500"<br />
31283675 Steel .904" +.600" 2.125" 11.100" 4.600"<br />
BIG BLOCK CHEVY<br />
CAST IRON ENGINE BLOCKS<br />
BIG M PRO SPECS<br />
Material: High Nickel 220<br />
BHN Cast Iron<br />
Deck Height: 9.600” to 11.100”<br />
Cylinder Bores: 4.500” to 4.600”<br />
Oil Pan Rails: Spread .750”<br />
Main Caps: Steel<br />
Cam Location: Raised +.600”<br />
Lifter Bores: .904”<br />
Freeze Plugs: Press fit<br />
Rear Seal:<br />
2-Piece<br />
Weight:<br />
250-310 lbs.<br />
Not intended for sale or use with pollution controlled vehicles.<br />
70<br />
248.362.1188 / DARTHEADS.COM Connect with us socially, search: DART MACHINERY
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