The legend is reborn with the BOSS 351 block! Stronger than the original!
• 4.125" bore capacity, finished at 3.990" to 3.995" rough bore. Also available in big bore version, part number: M-6010-BOSS351BB
• 9.5" deck height, finished at 9.500" plus .010" to .015"
• Maximum recommended stroke 4.250", clearance dependent on crankshaft/connecting rod manufacturer
• Splayed 4-bolt main on 2, 3, 4, main caps
• 2-bolt main on 1 and 5 main caps
• Main bearing bores finished to low limit
• 2.749" main journal diameter (stock 351C size)
• Finished lifter bores
• Machined to accept factory roller lifter guides and lifter guide retainer
• NASCAR inspired front oil feed on both lifter galleys.
• Revised cooling system passageways
• Siamese bore with drilled coolant crossover
• Increased bulkhead material
• Threaded core and galley plugs (straight thread port plugs with O-ring)
• Requires special length 1/2" head bolts M-6065-BOSS or head studs M-6014-BOSS recommended with M-6049-X306/307/Z304DA heads
• Designed for M-6049-X306//X307/C3/D3/Z304DA cylinder heads. Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads
• Uses common OD cam bearings M-6261-J351/R351
• Unique cam plug M-6026-S351 included
• M-6051-S331 or M-6051-CP331 head gasket recommended

• Designed to be compatible with the original 302 and 351W blocks and includes the following features:
• Designed to use stock type timing cover, timing Cover M-6059-D351 recommended (includes fuel pump provision)
• Fits factory mustang oil pan with custom oil pick-up tube M-6622-BOSS302
• M-6026-A Service Replacement Plug and Dowel Kit available separately – includes O-ring threaded plugs, black anodized aluminum plugs with Buna "O" rings for the oil galleys, water drains and core holes, and dowels for front cover, clutch housing and cylinder heads
  
• Retains clutch cross shaft pivot hole
• Original Style oil filter location
• Original motor mount boss locations
• Original bell housing pattern

• Weighs approximately 205 lbs.
• Great price and value
• The foundation for 9.5" deck projects

Proven performance - used in Ford Racing high performance crate engines, a proven winner out of the crate and thousands of laps before rebuild.

In the April 2010 issue of Circle Track Magazine, the editors built a Late Model Stock engine using the BOSS 351 block. To check out the article, visit the Circle Track site here.