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and inductive pick-up (IPU) ignition systems
26 Spline Input
5" backspacing and 5
Round Port
Dart Big M Sportsman Iron Engine Block BBC - 31223544 burst panel and inductive pick-up (IPU) ignition31223544 4. 560" Bore 9. 800" Deck Height Ductile Iron Main Caps Dart engineered the Big M to be the strongest, most reliable, and easiest to build big block on the market. With deck heights of 9. 800 and 10. 200 and bore sizes up to 4. 600, the Big M gives you the versatility to build a wide variety of engine combinations. The Big M is fitted with Billet Steel 4 bolt main caps for ultimate bottom end strength. The Sportsman block is fitted with
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