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Home > Racing Blocks > Dart Big Block Chevy Big M Aluminum
 Dart Big M Racing Block Chevy
Starting at $4998.00
Plus shipping
"Ready to Assemble" Race Prep 
& Finish Hone Available!
 

Dart Aluminum Big M Blocks

Dart Big M Blocks

 
DART ALUMINUM BIG M
PN REFERENCE
Part #
Main Caps
Deck Height
Bore Dia.
31264344
Steel9.8004.250
31264354
Steel10.2004.250
31264444
Steel9.8004.500
31264454
Steel10.2004.500
31264644
Steel9.8004.600
31264654
Steel10.2004.600
31274344
Ductile9.8004.250
31274354
Ductile10.2004.250
31274444
Ductile9.8004.500
31274454
Ductile10.2004.500
31274644
Ductile9.8004.600
31274654
Ductile10.2004.600

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 Inch638.4 (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 5/16h 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 OD4.740" 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 Block1.750"
 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

 

 

 

 

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