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Ships within 48 hours · Estimated delivery Sep 10 - Sep 15
563 in Knurl
including spark plug wires
and to adjust the built-in start retard providing options of 0‚Å ∞
1974-1991 GMC Jimmy
Constructed from 4340 forged steel for extreme strength
Dart Big M Engine Block - Bare Block - 4.500 in Bore - 9.800 Deck - 4-Bolt Main - 2-Piece Seal - Big Block Chevy 31213444 R060015YXL 563 in KnurlProduct Description: Engine Big M Bare Block 4. 500 in Bore 9. 800 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