Dart Machinery, LTD. stands behind each product we manufacture 100%. Each component undergoes a detailed manufacturing process that involves the hundreds of calculated and precision steps to ensure the finest quality possible.

Warning This product contains chemicals known to the State of California to cause cancer and reproductive harm. www.P65Warnings.ca.gov
LittleM 305 Water Top

Little M 305 Water SBC Iron



Excellent upgrade for stock replacement, street performance, Sportsman racing, circle track and legal for 305 RACESAVER® Sprint Series.

In order to accommodate the needs of racers in classes that require engines with stock displacements, Dart is now offering a Cast Iron Little M 305 water block with 3.750” cylinder bores.

The new Little M 305 water block has non-siamesed cylinder bores, priority main oiling and thick decks with blind head bolt holes that give the Little M block its reputation for reliability and excellent performance.


• Uses standard small block parts, including cam, timing chain, oil pump,

   oil pan, oil filter, motor mounts, mechanical fuel pump and clutch linkage.

• Priority main oiling system oils the main bearings first.

• Open lifter valley improves oil return to pan.

• Enlarged lifter bosses accommodate offset and oversized lifters.

• Blind head bolt holes don’t go through to water jacket.

• Splayed outer bolts on middle main bearing caps.

• Rear external oil feed, crossover and restrictor provision.

• Parts kit sold separately.

31151411 – Water Block 2-Piece Ductile 350 9.025 3.750

Little M SBC Block Information Packet – B03