Dart Little M Block Features:

• Extra-thick
cylinder walls resist cracking and improve ring seal for more power (minimum .275" thick with 4.125" bore).
• Scalloped water jacket walls improve flow around cylinders for better cooling.
• Priority main oiling system directs oil to main bearings first for more dependable lubrication.
• Front oil inlet simplifies plumbing with external pump.
• Blind-tapped head bolt holes prevent water leaks.
• Extra-thick decks for reliable hd gasket seal.
• Standard small-block deck height allows use of the off-the-shelf parts
• Four-bolt main bearing caps maintain proper bearing clearance under high loads.
• Splayed outer bolts on middle main bearing caps prevent cracks.
• Front four-bolt cap clears standard oil pan
• Rear four-bolt cap uses standard oiil pump and two-piece seal - NO adapter required
• Open lifter valley improves oil return to pan.
• Enlarged lifter bosses accommodate offset and oversized lifters.

The Little M block is the affordable alternative! The Little M block is the affordable alternativ for the serious small-block racers.  Our precision machining eliminates the time and expense of "blueprinting" a stock block.  With extra-thick cylinder walls, four-bolt main bearing caps, 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

The Little M gives you the choices you want.
The Little M gives you the choices you want in a production-type block.  You can select nodular iron or steel four-bolt main bearing caps, .400" or 4.125" cylinder bores, and 350 or 400 main bearings.  Build it your way with Dart!

Don't waste time on a questionable junkyard block!
Or waste money on machining a "semi-finished" factory casting.  The Little M is brand new, fully machined and virtually ready to assemble with off-the-shelf small-block components.  You'll make more power and save money in the long run with a strong, reliable Dart Little M block!