Dart BBC Big M Sportsman ductile cap 9.8" deck 4.6" bore .842" block #31223644 400 INTAKE (55° Valve Job)

400 INTAKE (55° Valve Job)      143           218          291         352          402          449          470          481

SB Chevy AluminumξBARE Pro 1ξCylinder Heads #11210010

Maximum open spring pressure 450lbs

BP BB-3 XTRA O 365)• Exhaust Valves: 1

Dart BBC Big M Sportsman ductile cap 9.8" deck 4.6" bore .842" block #31223644 400 INTAKE (55° Valve Job)CALL SHANON AT 507 445 3235 FOR ANY QUESTIONS. Dart BBC Big MSPORTSMAN BLOCK #31223644 Main Caps: Ductile Iron Standard Main Bearing Diameter Deck Height: 9. 800 Cylinder Bore Diameter: 4. 600 (made to hone to 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