Dart engineered the Big M Sportsman 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 Sportsman gives you the versatility to build a wide variety of engine combinations.
The Big M Sportsman 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.
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 Sportsman block is fitted with Ductile Iron 4-bolt main caps.
