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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1
140 INTAKE 157 212 260 303 319 321 325
Easily Repaired 5° Intake Flange Available
- BR 81138 (SPRING UPGRADE) • Valve Springs: 1
5 psig @ redline on stock engine
(CNC Ported) 1
DART BIG BLOCK CHEVY BIG M SPORTSMAN 9.8" DECK 4.5" BORE BLOCK 31223444 140 INTAKE 157 212 260CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Dart BBC Big M SPORTSMAN BLOCK #31273444 Main Caps: Ductile Iron Standard Main Bearing Diameter Deck Height: 9. 800 Cylinder Bore Diameter: 4. 500 (made to hone to 4. 500) The Dart Big M Sportsman block was designed to be a more affordable version of the highly popular Big M. The Sportsman block is fitted with ductile iron 4 bolt main caps, and features a redesigned lubrication system that oils all of
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