Dart Block_Big M Sportsman_Chevrolet 454_9.800 Block Height

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Dart Block_Big M Sportsman_Chevrolet 454_9.800 Block Height_4.310 Bore

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Our Price: $3,110.00

Product Code: DRT-31243244

Description

Technical Specs

Dart engineered the Big M to be the strongest, most reliable, and easiest to build big block on the market. With deck heights of 9.800 and 10.200 and bore sizes up to 4.600, the Big M gives you the versatility to build a wide variety of engine combinations. The Sportsman block is fitted with Ductile Iron 4-bolt main caps.

FEATURES

Standard 9.800 and tall 10.200 deck heights.
Standard 4.250, 4.500, 4.560 or 4.600 bore sizes with Siamese 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 in Ductile Iron 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

Freight not included. There is a 4% convenience fee for credit cards. Zelle, ACH, or checks have no charges attached.

Please call to verify availability.

www.P65Warnings.ca.gov

Item Code	DRT-31243244
Vendor	Dart Machinery
Product Type	Engine Block
Product Model	Big M Sportsman Iron Block
Engine Family	Chevrolet 454
Material	Cast Iron
Base Bore	4.250
Max Bore	4.625
Stroke	4.750 max
Cam Bore ID	2.120 (Standard)
Cam Bearings	Coated Grooved, w/3 holes (Dart P/N 32210030)
Cam Bearing Press	.002
Camshaft Position	Standard or +.400 Raised
Cam Drive	Timing Chain, Gear Drive, or Belt Drive
Cam Plug	Standard BB Chevrolet 2.215 )P/N 3252000)
Max Cubic Inches	632
Cylinder Wall Thickness	.300 @ 4.625 Bore
Deck Height	9.800
Deck Thickness	Adequate for all applications
Fuel Pump	Mechanical Pump Provision
Fuel Pump Pushrod	Standard Big Block Chevrolet or .200 for Raised Cam
Freeze Plugs	Standard Press-in 1.625 Diameter
Head Bolt Pattern	Standard Big Block Chevrolet
Inside Head Studs	Not Included (P/N 64210240)
Lifter Bores	Big Block Chevrolet .8427 _ .8437 Plus .300 Taller Gen IV_V Style
Main Bearing Size	Big Block Chevrolet Standard
Main Bearing Bore	2.937 - 2.938
Main Caps	Ductile Iron 4 Bolt
Oil System	Priority Main _ Wet or Dry Sump
Oil Galley_Main	5/8
Oil Cooler Holes	None (can use aftermarket inline)
Oil Galley_Filter Main	None (can use aftermarket inline)
Oil Filter	Stock Filter Location
Oil Pan	Standard Big Block bolt pattern and stroker pattern at mains
Rear Main Seal	Standard 2 piece - FelPro 2918
Hydraulic Roller Provisions	None
Serial Number	Main Caps and front passenger side below deck
Starter	Mounts in standard location
Studs and Bolt Holes	Blind tapped
Tapped Holes	Standard English thread and pitch
Timing Chain/Gears	Standard BBC
Timing Cover	Stock
Torque Specs	All 1/2 Bolts _ 100 ft lbs (wCMD 3 lube)
Weight	280 lbs

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