Dart Big M Block 9.800 Deck 4.600 Bore PN 31263644

Description

Dart Big M Big Block Chevy 9.800 Deck 4.600 Bore Ductile Caps PN
31263644
Dart engineered the Big M to be the strongest, most reliable and easiest to build big block on the market today. The Big M block is fitted with steel billet 4 bolt main caps and is also available in 10.200 deck and bores ranging from 4.250 to 4.600. We also carry the Big M Sportsman line with ductile main caps, check out our ebay store or send us a message.
Specs
• Standard 9.800 deck.
•
4.600” with siamesed extra thick cylinder
walls to resist cracking and improve ring seal (minimum .300” thick with 4.625” bore).
• Uses +.300” tall Gen VI style lifters. Modification for Gen IV style available.
• 4-bolt main bearing caps steel billet splayed outer bolts for extra strength.
• True priority main oil system lubricates the main bearings before the lifters. Our stepped main oil gallery (9/16“ to 1/2“ to 7/16“) increases the flow of oil to the crank at high RPM,
and our front oil crossover eliminates internal oil leaks around the distributor shaft.
• Lifter valley head stud bosses prevent blown head gaskets.
• Dual oil pan bolt patterns fit standard and notched oil pans.
• Big M Parts kit sold separately (PN 32000002).
Freight
All blocks are shipped via ground freight truck. We recommend having your block shipped to a commercial location with a loading dock and or forklift truck on site. All residential shipments and lift gates will cost extra. Please leave a message with your shipping address for a quote on freight.