Dart SBC Little M Iron Block 9.025 4.000/350 31191111

If you're building a street or race engine on a realistic budget, the Dart Little M iron block delivers the reliability and performance of a purpose-built platform without the premium price tag. This cast iron foundation uses standard small block Chevy architecture—meaning you can source affordable off-the-shelf components—while adding competition-grade features like priority main oiling, extra-thick cylinder walls, and reinforced main caps that rival much more expensive alternatives. Whether you're targeting consistent street performance or track duty, the Little M gives you the structural integrity to support serious horsepower without compromise.

• Engine type: Small Block Chevy
• Block style: Little M bare block
• Material: Premium Class 32B iron
• Bore: 4.000 in.
• Deck height: 9.025 in. (standard)
• Main bearings: 350 size
• Main cap design: 4-bolt splayed billet steel
• Seal type: 2-piece rear main
• Cylinder walls: Extra thick Siamese
• Oiling system: Priority main feed + crossover provision
• Head bolt holes: Blind tapped (water leak prevention)
• Deck thickness: Extra reinforced
• Compatibility: Standard SBC parts (cam, timing chain, oil pump, pan, mounts)
• Installation: Bare block (requires full assembly)
• MPN: 31191111