Dart 31151111 Short Blocks

Little M Sportsman Small Block
350 Mains

The Little M is cast from premium high strength iron and beefed up in all the critical areas. A competition oiling system ensures adequate lubrication to the main bearings at high rpm. You can select 4.000 or 4.125 cylinder bores, and 350 or 400 main bearings with steel 4 bolt main caps. Front and rear external oil feed, crossover and restrictor provision simplify plumbing with external pumps.

With a standard deck height, extra thick siamese cylinder walls and a competition oiling system, the Little M is the perfect starting point for a powerful and reliable engine for the street or the race track.

Features:

• Extra thick cylinder walls resist cracking and improve ring seal for more power.
• Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures.
• Priority main oiling system directs oil to the main bearings first for more dependable lubrication.
• Blind tapped head bolt holes prevent water leaks.
• Extra thick decks ensure reliable head gasket seal.
• Standard small block deck height allows use of off the shelf parts.
• Splayed outer bolts on middle main bearing caps prevent cracks.
• Open lifter valley improves return to oil pan.
• Enlarged lifter bosses accommodate offset and oversize lifters.
• 4 bolt billet steel main caps have splayed outer bolts for extra strength.
• Front and rear external oil inlets, crossovers and restrictor provisions to simplify plumbing with external pump.
• Block includes special coated cam bearings, freeze plugs and dowels.