DART Big M Block Big Block Chevy 4.500 Bore / 9.8 Deck (4 Bolt Main) With Cast Main Caps, Dart has engineered the Big M sportsman block to be the strongest, most reliable, and easiest to build big block on the market.
- Dart Big M BBC Block
- Bare Block
- 4.500 in Bore
- 4.625 Bore
- 4.500 Max Stroke
- 598 Max Cubic Inches
- 9.800 Deck (Short Deck)
- 4-Bolt Main
- 2 Piece Seal
- Iron
- Weighs 250 Pounds
- Big Block Chevy
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