The Little M is designed from the ground up as a true high performance block which can be used with standard off-the shelf small block components. It is cast from premium high-strength iron and beefed up in all the critical areas. With a standard deck height, extra-thick 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. You can select 4.00" or 4.125" cylinder bores, and 350 or 400 main bearings. Front and rear external oil feed, crossover and restrictor provision.

• Uses standard small-block parts, including cam, timing chain, oil pump, oil pan, oil filter, motor mounts, mechanical fuel pump, and clutch linkage
• Extra-thick cylinder walls resist cracking and improve ring seal for more power (minimum .275î thick with 4.185î 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 & rear oil inlets simplifiy plumbing with external pump
• 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
• 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 oil pump and two-piece seal - no adapter required!
• Open lifter valley improves oil return to pan
• Enlarged lifter bosses accommodate offset and oversize lifters

The Pro Series adds special racing oriented features which were previously only available as costly custom work from specialized machine shops. These include a cam upgrade to 50mm and block lightening options.