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PORT VOLUME INT
4-1 with 118cc heads
components required for the GB 2000 series and DR heads are injectors or modified intake
230 INTAKE 141 221 295 351 396 421 435
* Supercharged horsepower and torque data shown is a calculated estimate based on percentage increases from actual rear wheel hp/tq measurements
DART BBC BIG M SPORTSMAN 10.2" DECK 4.25" BORE .842" STANDARD CAM BLOCK 31223354 PORT VOLUME INTCALL SHANON AT 507 445 3235 FOR ANY QUESTIONS. Dart BBC Big M SPORTSMAN BLOCK #31223354 Main Caps: Ductile Iron Standard Main Bearing Diameter Deck Height: 10. 200 Cylinder Bore Diameter: 4. 250 (made to hone to 4. 25) 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 the