Starting at $4998.00 Plus shipping "Ready to Assemble" Race Prep  & Finish Hone Available!
	DART ALUMINUM BIG M PN REFERENCE Part # Main Caps Deck Height Bore Dia. 31264344 Steel 9.800 4.250 31264354 Steel 10.200 4.250 31264444 Steel 9.800 4.500 31264454 Steel 10.200 4.500 31264644 Steel 9.800 4.600 31264654 Steel 10.200 4.600 31274344 Ductile 9.800 4.250 31274354 Ductile 10.200 4.250 31274444 Ductile 9.800 4.500 31274454 Ductile 10.200 4.500 31274644 Ductile 9.800 4.600 31274654 Ductile 10.200 4.600

Aluminum Big M BBC

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
• Available in 9.8, 10.2, or 10.4 deck heights
• Standard or Raised .400 Cam
• Steel or Ductile Iron Caps
• Available in 4.250, 4.500 or 4.600 Bore Sizes
• 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
• 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.

Aluminum Dart Big M Big Block Specifications

	Material:	355-T61 Aluminum Alloy
	Bore:	4.250”, 4.500” & 4.600”
	Bore & Stroke:	4.625” x 4.750” (max recommended)
	Cubic Inch	638.4” (max recommended)
	Cam bearing bore ID:	BBC - 2.1195”- 2.1205”
	Camshaft position:	Std. Location or .400” raised available
	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"
	Camshaft to Crank:	5.152" Std. / 5.552" +.400
	Camshaft Snout:	BBC
	Cam Plug:	2.375” Dia. Cup Plug w/ .030 thick Snap ring
	Cylinder Wall Thickness:	Min @ 4.770 (+.030) is .070 - .080 thick
	Deck Height:	9.800" & 10.200" +/- .002"
	Deck Thickness:	.625"h min.
	Fuel Pump:	Mechanical pump provision
	Fuel Pump Pushrod:	Std. BBC pushrod (+.200" pushrod for raised .400" cam)
	Freeze Plugs:	Threaded 1 5/16�h OD (1.312")
	Lifter Bores:	SBC .8427" - .8437"
	Main Bearing Size:	Std. BBC
	Main Bearing Bore:	2.937" - 2.938"
	Main Caps:	Steel - 4 bolt splayed .005" press
	Main Cap Bolts:	4 bolt
	Oil System:	Wet or Dry Sump - Main Priority Oiling
	Oil Pump Shaft:	BBC shaft (Moroso #22074 is a hex design for +.400" cam)
	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:	Left front & main caps
	Sleeve OD	4.740" OD
	Sleeve O.S.:	+ .010", +.020" & +.030" available
	Sleeve Thickness:	4.250 Bore (.245) 4.500 Bore (.120) 4.600 Bore (.070)
	Sleeve Length:	9.800 Deck (6.370) 10.200 Deck (6.770) 10.400 Deck (7.00)
	Starter:	Mounts on either side
	Studs, Mains:	1-5 Inner . x 4.850 2-4 Splayed . x 3.800 1 & 5 Outer . x 4.325
	Studs, Heads;	Must use our head studs
	Stud Holes, Head:	Blind holes Head
	Stud Length in Block	1.750"
	Timing Cover:	Std BBC Timing Cover Dart 67240002 for +.400 cam
	Timing chain/gears:	Std BBC or BBC +.400
	Torque Specs:	1-5 100 ft lbs with high pressure lube
	Weight:	9.800 x 4.250 bore (160lbs) - 9.800 x 4.500 bore (136lbs) 10.200 x 4.250 bore (168lbs) - 10.200 x 4.500 bore (144lbs