Dart big block Chevy Big M Sportsman 10.2" deck 4.5" bore block #3123454 • Torque Heads: 70 ft-lb

• Torque Heads: 70 ft-lb • Torque Rocker Studs: 40-45 ft-lb • Intake Gaskets: O-RINGED

430 7° STEEL - CC 743 (IK 180

5:1 with 9:1 being ideal

KC 16 STD           2

RR BB-O           396 - 502          9

Dart big block Chevy Big M Sportsman 10.2" deck 4.5" bore block #3123454 • Torque Heads: 70 ft-lbCALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Dart BBC Big M SPORTSMAN BLOCK #3123454 Main Caps: Ductile Iron Standard Main Bearing Diameter Deck Height: 10. 200 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