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Engine block Chev BB big M 4.500" bore 9.800" deck height st


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Part No: DART31263444
Engine block Chev BB big M 4.500" bore 9.800" deck height steel caps 2 piece rear main Priority main oiling 4.625" max bore Dart Block 31263444 / 31213444
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  Your Price $7,234.80
Dart Big M Sportsman
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 Ductile Iron 4-bolt main caps.



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