Dart Big M Bare Block - 4.500" Bore - 10.200 Deck - 4-Bolt Main - 2 Piece Seal - Iron - Big Block Chevy RJS Racing Equipment Billet aluminum fittings are anodized

Billet aluminum fittings are anodized bright dip black for corrosion protection

The accuracy and simplicity of the Hex-A-Just® system is unmatched by our competitors

Adapter fittings sold separately

then we won't build it

Dart Big M Bare Block - 4.500" Bore - 10.200 Deck - 4-Bolt Main - 2 Piece Seal - Iron - Big Block Chevy RJS Racing Equipment Billet aluminum fittings are anodizedProduct Description: Engine Big M Bare Block 4. 500 in Bore 10. 200 Deck 4 Bolt Main 2 Piece Seal Iron Big Block Chevy Sold Individually Since 1981, Dart Machinery has become the acknowledged leader in producing race winning components. Dart Machinery aluminum and cast iron engine blocks are designed to meet the specialized needs of racers and performance enthusiasts. Dart components are developed in house, manufactured on Dartas own CNC machining