Starting at $2122.10 Plus shipping "Ready to Assemble" Race Prep  & Finish Hone Available!
	"BIG M" IRON BIG-BLOCKS PN REFERENCE DART PN Deck Height Bore 31263344 9.800 4.250 31263354 10.200 4.250 31263444 9.800 4.500 31263454 10.200 4.500 31263644 9.800 4.600 31263654 10.200 4.600

Dart Big M Big Block Chevy Block

If you're ready to build a bad to the bone Big Block Chevy then don't you owe it to yourself to base your combo on the best engine block available? Then look no further than the Dart Big M - the standard platform most racing winning BBC engines use!

Features

• Made in the USA
• Brand new precision machined block
• Premium high strength cast iron
• Available in 9.8 or 10.2 deck heights
• Priority main oiling system oils all of the main bearings before the lifters
• Siamesed extra thick cylinder walls resist cracking and improve ring seal
• Blind head bolt holes
• Oil filter boss drilled and tapped for external oil pump lines
• Can clear 4.50 stroke crank with steel rods with no grinding
• Two additional head bolt bosses on each side of lifter valley
• Splayed 4 bolt center three main caps
• All OE bolt holes for starter, clutch ball, etc.

Options

Also available as a ready to assemble package from Lukovich Racing Engines with finish honing, with complete or partial rotating assembly, or in assembled short block and long block combinations.

Dart Big M Big Block Specifications

	Material:	Superior Cast Iron Alloy
	Bore:	4.250" to 4.500" (max 4.630")
	Stroke:	4.750" max
	Cubic inch:	632" (max recommended 4.625" bore x 4.750 stroke")
	Cam bearing bore ID:	2.120"
	Camshaft position:	Standard
	Cam Drive:	Timing chain, Gear drive & Belt drive
	Cam Bearings:	Special coated, grooved, w/3 oil holes (Not included)
	Cam Bearing O.S. :	+.010", +.020", +.030"
	Cam Bearing Press:	.002"
	Cam Journal OD:
	Cam Plug:	Standard BBC 2.215" diameter
	Cylinder Wall Thickness:	.300" min # 4.625"
	Deck Height:	9.800" & 10.200"
	Deck Thickness:	Adequate for all applications
	Fuel Pump:	Mechanical pump provision
	Fuel Pump Pushrod:	Std. BBC
	Freeze Plugs:	Press in cup plugs
	Lifter Bores:	BBC .8427" - .8437"
	Main Bearing Size:	Std. BBC
	Main Bearing Bore:	2.937" - 2.938"
	Main Caps:	Steel Billet or Ductile Iron (Sportsman)
	Main Cap Bolts:	4 bolt
	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 Pump Shaft:
	Oil FIlter:	Stock oil filter location
	Oil Pan:	Standard pan bolt pattern, extra bolt holes provided for strokers
	Rear Main Seal:	STD 2 pc seal / Fel-Pro# 2918
	Serial Number:	On main caps
	Starter:	Mounts in standard location
	Stud Holes, Head:	Blind holes Head: Timing chain/gears
	Timing Cover:	Stock Cover
	Torque Specs:	All 1/2" bolts - 105 lbs
	Weight:	4.250 bore (280lbs) - 4.500 bore (260lbs) 4.60 bore (250lbs)