Little M SportsmanChevy Small Block Iron Block – 4.000-4.125 In. Bore, 9.025 In. Deck

Excellent racing, marine performance upgrade or stock replacement block. Street performance, Sportsman racing.

Dart’s Little M Sportsman block is the affordable alternative for Sportsman racers and serious street performance.

The Sportsman block shares most of the Little M’s best features, but saves you money by using Ductile Iron main bearing caps (4-bolt on the centre three and 2-bolt on the ends), and employing a rear external oil feed, crossover and restrictor provision.

FEATURES
• 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 feeds the main bearings first.
• Siamese cylinder bores with extra thick walls resist cracking and improve ring seal for more power (minimum .275” thick with 4.185” bore).
• Scalloped water jacket walls improve flow around cylinders for better cooling.
• Open lifter valley improves oil return to pan.
• Solid lifter bar design, to allow for offset and oversize 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 (PN 32000021)

LITTLE M SPORTSMAN SPECS
Material: 220 BHN Cast Iron
Deck Height: 9.025” (stock)
Cylinder Bores: 4.000” or 4.125”
4.185" (max)
Main Bearings: 350 or 400
Main Caps: Ductile Iron
4-bolt #2, 3 & 4
2-bolt #1 & 5
Cam Location: Stock
Lifter Bores: Stock .842”
Freeze Plugs: Press fit
Rear Seal: 2-Piece
Weight: 197-205 lbs.

31191111 Sportsman Block 2-Piece Ductile 350 9.025" 4.000"
31191211 Sportsman Block 2-Piece Ductile 350 9.025" 4.125"
31192111 Sportsman Block 2-Piece Ductile 400 9.025" 4.000"
31192211 Sportsman Block 2-Piece Ductile 400 9.025" 4.125"