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The Race-Rite®
(CNC Ported) 1
Height 72cc 80cc 84cc Dome Volume Gram Weight Foot Notes Piston Number Street Ring Set 383 4
000 140
Timing Marks
DART BIG BLOCK CHEVY BIG M SPORTSMAN BLOCK BBC 31273344 The Race-Rite®CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Dart BBC Big SPORTSMAN BLOCK #31273344 Main Caps: Ductile Iron Standard Main Bearing Diameter Deck Height: 9. 800 Cylinder Bore Diameter: 4. 250 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 main bearings before the