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Ships within 48 hours · Estimated delivery Jul 28 - Aug 2
250 Rollers
WILL SHIP ANYWHERE IN THE LOWER 48 STATES FOR $29
005 undersize chain available for line honed blocks 6
52 CHEVY SB - with BB crank n/a 9-3600BTX3 146
highly efficient combustion chambers
Dart big block Chevy Big M Sportsman block BBC 31233654 250 RollersCALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Dart BBC Big M SPORTSMAN BLOCK # Main Caps: Ductile Iron Standard Main Bearing Diameter Deck Height: 10. 200 Cylinder Bore Diameter: 4. 600 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