Dart 31273444 BBC Big M Block

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Dart's Big Block Chevy Big M Engine Block:
Material: Superior Iron Alloy
Bore: 4.500"
Bore & Stroke: 4.625" x 4.750" max recommended
Cam Bearing Bore ID: 2.1195" - 2.1205"
Cam Bearings: Special coated, grooved with 3 oil holes
Cam Bearing OS: +.010", +.020", +.030"
Cam Bearing Press: .002"
Camshaft Position: Standard
Cam Drive: Standard timing chain, gear drive or belt drive
Cam Plug: Standard BBC 2-7/32" (2.218" dia)
Cubic Inch: 632" max recommended
Cylinder Wall Thickness: .300" min @ 4.625" bore
Deck Height: 9.800"
Deck Thickness: Adequate for all applications
Fuel Pump: Mechanical pump provision
Fuel Pump Pushrod: Standard BBC
Freeze Plugs: Press in cup plugs
Head Gasket: Fel-Pro 375-1037, 1047, or 1067
Inner Head Stud: 2 slotted bosses per side
Lifter Bores: BBC .8427" - .8437"
Lifter Galley: Raised .350" for longer lifter bore
Lifter Type: Roller - Gen VI (+.300" longer), Solid - Mark IV
Main Bearing Size: Standard BBC
Main Bearing Bore: 2.937" - 2.937"
Main Caps: 4-bolt ductile iron
Main Cap Register: Deep stepped register on each side (No need for dowels)
Main Cap Press: .005"
Main Cap Bolts: All 1/2", #2, #3, #4 have splayed outer bolts
Oil System: Wet or Dry Sump - Main Priority Oiling
Oil Galley, Main: Stepped, 9/16" -1/2" - 7/16"
Oil Galley, Filter-Main: 5/8"
Oil Filter: Stock Oil Filter Location
Oil Pan: Standard pan bolt pattern, extra bolt holes provided for strokers
Rear Main Seal: Standard 2pc seal, Fel-Pro 375-2918
Rear main Thrust Width: 1.622"-1.624"
Serial Number: on main caps
Starter: Mounts in standard location
Stud Hole, Head: Blind holes
Timing Chain/Gears: Standard
Timing Cover: Stock Cover
Torque Specs: All 1/2" bolts - 105lbs
Weight: 4.500" bore - 260lbs

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WARNING: This product contains a chemical known to the State of California to cause cancer and reproductive harm. See https://www.p65warnings.ca.gov/ for details.


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