Dart Big M Sportsman Block 31223344 BBC 4.250 Bore, 9.800 Deck

BB Chevy, Dart Block, Dart Big M Sportsman Block, 9.800 Deck Height, 4.250 Bore, Ductile Main Caps, Engine Block, Cast Iron, 2pc Rear seal

$3,599.99

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FREIGHT CHARGE

This part will be shipped via truck freight and additional shipping charges will apply. Multiple parts shipped via freight in an order may increase the total shipping amount.

⚠ PROP 65 WARNING

⚠ WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer. Please contact us to obtain a list of harmful chemicals. For more information, go to www.P65Warnings.ca.gov.

Description

Dart engineered the Big M sportsman to be the strongest, most reliable, and easiest to build big block on the market.

9.800” deck height

Standard 4.250” bore, Max bore is 4.625 size, 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

4-bolt ductile iron main bearing caps have 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 Sportsman: Parts kit sold separately (PN 32000022 )

Specifications

More Information
CNC Part Number	DRT-31223344
Price	$3,599.99
Manufacturer's Part Number	31223344
Brands	Dart
Part Types	Engine Block
Departments	Parts
Vehicle Make	BB Chevy
Bore Size	4.250
Deck Height	9.800
Block Series	Big M Sportsman
Engine Block Material	Cast Iron
Main Caps	Ductile
Main Size	Std/BBC
Cam Location	Standard Location
Lifter Bore Size	.842
Cam Tunnel Size	Standard Size

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