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Dart BB Chevy Cylinder Blocks
Big M Sportsman - - Big M - - Race Tall Deck series
Total freight cost $175.00 on BBC Cylinder Blocks

Dart BBC Iron Cylinder Blocks--3 BBC cylinder blocks to choose from:

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*Dart BBC Big M Sportsman Cylinder Block has 4 bolt ductile iron main caps on all positions--splayed design on center 3 caps, front and rear are vertical 4 bolt--.300 wall thickness at 4.625 bore-
*Dart BBC Big M Cylinder Block--similar to the Sportsman series but strenghtens the bottom end further with steel billet main caps-
*Dart BBC Tall-Deck Race Cylinder Block--an altogether different casting with .400 wider pan rail and .600 raised cam to provide clearance for strokes up to 5.500--options for 4.840 or 4.900 bore spacing--block heights from 10.00 to 11.100--bores from 4.500 to 4.700-


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Note: Dart cylinder blocks are unfinished about .007 short of bore size listed and require boring and/or honing to your desired size--check all pipe plugs for correct depth prior to assembly--
Cambearing Note: Dart's housing bore for cambearings are all finished to the same OD which require special cambearing sets that are listed at the end of each block section

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Big M Sportsman go to
Big M
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Tall-Deck Race
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$175.00 total shipping cost for all Dart BBC Cylinder Blocks (inside continental USA)
dart cylinder blockBig M Sportsman Cylinder Blocks

*2 piece rear main seal--has lifter valley head stud bosses if needed--
*ductile iron caps, 2-3-4 mains are 4 bolt splayed design, 1 and 5 main have vertical 4 bolt-
*cylinder wall thickness: .300 thickness at 4.625 bore--
*provides clearance for 4.500 strokes w/o grinding--
*can use stock oil filter pad and stock oil pump mounting but easily adapts to external pump and filters--
*cambearings, freeze plugs and dowel kit are not included. (note: Dart Big M does not accept stock OEM cambearings-see cambearing listing below)--

part # block material main cap material main bearing diameter block height bore diameter price buy
31273344 iron nodular iron std bbc 9.800 4.250 $2369.87
31273354 iron nodular iron std bbc 10.200 4.250 $2369.87
31273444 iron nodular iron std bbc 9.800 4.500 $2369.87
31273454 iron nodular iron std bbc 10.200 4.500 $2369.87
31273644 iron nodular iron std bbc 9.800 4.600 $2369.87
31273654 iron nodular iron std bbc 10.200 4.600 $2300.85
Extra Parts for Dart's BBC Big M Sportsman Cylinder Block
64210240 Dart BBC Lifter Valley Stud Kit (4 studs, nuts, washers, and shoes) $83.38
32210030 coated cambearings for BBC Big M Sportsman block $64.68
Big M parts kit brass freeze plugs, dowel kit and cam plug for BBC Big M Sportsman block $25.00
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Big M Sportsman
Big M go to
Tall-Deck Race
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$175.00 total shipping cost for all Dart BBC Cylinder Blocks (inside continental USA)
dart cylinder blockBig M Cylinder Blocks

*2 piece rear main seal--has lifter valley head stud bosses if needed--
*steel billet caps, 2-3-4 mains are 4 bolt splayed design, 1 and 5 main have straight 4 bolt--
*cylinder wall thickness: .300 thickness at 4.625 bore--
*provides clearance for 4.500 strokes w/o grinding--
*can use stock oil filter pad and stock oil pump mounting but easily adapts to external pump and filters--
*includes cambearings, freeze plugs and dowel kit (note: Dart Big M does not accept stock OEM cambearing size-see cambearing listing below)--
*see more specs--

part # block material main cap material main bearing diameter block height bore diameter price buy
31263344 iron steel billet std bbc 9.800 4.250 $2824.11
31263354 iron steel billet std bbc 10.200 4.250 $2824.11
31263444 iron steel billet std bbc 9.800 4.500 $2909.68
31263454 iron steel billet std bbc 10.200 4.500 $2909.68
31263644 iron steel billet std bbc 9.800 4.600 $2909.68
31263654 iron steel billet std bbc 10.200 4.600 $2909.68
Extra Parts for Dart's BBC Big M Cylinder Block
64210240 Dart BBC Lifter Valley Stud Kit (4 studs, nuts, washers, and shoes) $83.38
32210030 coated cambearings for Big M $64.68
Big M parts kit brass freeze plugs, dowel kit and cam plug for Big M Sportsman block $25.00
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Big M Sportsman
go to
Big M
Tall-Deck Race Back to Top
$135.00 total shipping cost for all Dart BBC Cylinder Blocks (inside continental USA)
dart tall deck cylinder blockTall-Deck Race Cylinder Blocks

*2 piece rear main seal--lifter valley head stud bosses provided--
*steel billet caps, 2-3-4 mains are 4 bolt splayed design, 1 and 5 main have vertical 4 bolt--
*oil pan rails spread .750 and cam location raised .600 for big stroke applications--
*provides clearance for 5.500 strokes--provisions for mechanical fuel and water pump--
*can use stock oil filter pad and stock oil pump mounting but easily adapts to external pump and filters--
*see more specs--

NOTE: The Tall Deck Cylinder Blocks listed below, come with a .904 lifter bore (unbushed) and the DRCE cambearing housing bore of 2.250 for a cam journal size of 2.125, however, Dart's sophisticated manufacturing techniques allow the Tall Deck Race Block to be custom ordered by adding options for the lifter bore size, cam journal size and type of lifter used--
First select a block from the table, then select your options listed below the table.
part # block material main cap material main bearing diameter block height bore diameter bore spacing price buy
31283485 iron steel billet std bbc 10.000 4.500 4.840 $3283.58
31283685 iron steel billet std bbc 10.000 4.600 4.840 $3283.58
31283455 iron steel billet std bbc 10.200 4.500 4.840 $3283.58
31283655 iron steel billet std bbc 10.200 4.600 4.840 $3283.58
31283495 iron steel billet std bbc 10.400 4.500 4.840 $3283.58
31283695 iron steel billet std bbc 10.400 4.600 4.840 $3283.58
31283465 iron steel billet std bbc 10.600 4.500 4.840 $3283.58
31283665 iron steel billet std bbc 10.600 4.600 4.840 $3283.58
31293665 iron steel billet std bbc 10.600 4.600 4.900 $3283.58
31293865 iron steel billet std bbc 10.600 4.700 4.900 $3283.58
31283475 iron steel billet std bbc 11.100 4.500 4.840 $3283.58
31283675 iron steel billet std bbc 11.100 4.600 4.840 $3283.58
31293875 iron steel billet std bbc 11.100 4.700 4.900 $3283.58
Extra Parts for Dart's BBC Tall Deck Race Cylinder Block
64210240 Dart BBC Lifter Valley Stud Kit (4 studs, nuts, washers, and shoes) $83.38
32210030 Coated Cambearings-OEM BBC cam journal (bearings fit 2.120 housingbore) $64.68
32220041-5 Roller Cambearings for 50mm cam journal (bearings fit 2.282 housing bore) $109.73
32220042-5 Roller Cambearings for 55mm cam journal (bearings fit 2.479 housing bore) $118.89
32210101-5 Coated Cambearings for 55mm cam journal (bearings fit 2.298 housing bore) $133.17
32220043-5 Roller Cambearings for 60mm cam journal (bearings fit 2.677 housing bore) $160.98
32210200 Coated Cambearings for 60mm cam journal (bearings fit 2.479 housing bore) $138.84
32220050 DRCE Coated Cambearing Set (bearings fit 2.250 housing bore) $76.07
Dart Tall Deck Race Cylinder Block Options
description of option buy
option 1.--select your cam journal size--(if no choice is made here, block will be machined to accept the DRCE camshaft (2.125 cam journal--does not include the cambearings.)
Below are 2 options for lifter bore sizes:
see 2a--for unbushed lifter bores in sizes .842-.875-.904-.937
see 2b--for .875-.904-.937 lifters if you want to use a bushing (however, in this option, Dart will only machine the lifter bores to accept a bushing (bushings are not included or installed in this option-
(see option 3 for 1.063 lifters,complete installation of bushings, and keyway style bushings)
option 2a.--Dart will machine the lifter bores to .842, .875, .904, .937--unbushed
option 2b.--or Dart will machine the lifter bores to 1.062 to accept a bushing for .875-.904-.937 lifters-/-or a 1.187 hole is machined to accept a bushing for the 1.063 lifter
(see option 3 for 1.063 lifters, Dart's complete installation of bushings, and bushings for keyway style lifters)
option 3.--Select the Lifter Style and Lifter Size-Dart will supply the appropriate bushing and complete machining of the lifter bore bushings for the lifter you select.--NOTE:-- (does not include lifters)