• 4.125" bore capacity, finished at 3.990" to 3.995" rough bore  
• 8.2" deck height, finished at 8.200" plus .010" to .015"  
• Maximum recommended stroke 3.400"  
• Splayed 4-bolt main on 2, 3, 4, main caps  
• 2-bolt main on first and fifth main caps  
• Main bearing bores finished to low limit  
• Finished lifter bores  
• Machined to accept factory roller lifter guides and lifter guide retainer  
• Fits factory Mustang oil pan with custom oil pickup tube  
• Revised oiling and cooling system passageways  
• Siamese bore with drilled coolant crossover holes  (Except on M-6010-B302BB)  
• 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  
• Weighs approximately 163 lbs.  
• Great price and value  
• The foundation for 8.2" deck projects

• 4.125" bore capacity, finished at 4.115" rough bore
• 8.2" deck height, finished at 8.200" plus .010" to .015"
• Maximum recommended stroke 3.400"
• Splayed 4-bolt main on 2, 3, 4, main caps
• 2-bolt main on first and fifth main caps
• Main bearing bores finished to low limit
• Finished lifter bores
• Machined to accept factory roller lifter guides and lifter guide retainer
• Fits factory Mustang oil pan with custom oil pickup tube
• Revised oiling and cooling system passageways
• Siamese bore
• 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
• Weighs approximately 163 lbs.
• Great price and value
• The foundation for 8.2" deck projects

 The legend is reborn with this all new 351 block!  Stronger than the original!  
• 4.125" bore capacity (sonic check recommended), finished at 3.990" to 3.995" rough bore  
• 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  
• Revised oiling and 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  
• Weighs approximately 205 lbs.  
• Great price and value  
• The foundation for 9.5" deck projects

• Same as M-6010-BOSS35195 except at 9.2" deck height  
• 4.125" bore capacity, finished at 3.990" to 3.995" rough bore  
• 9.2" deck height, finished at 9.200" plus .010" to .015"  
• Maximum recommended stroke 4.00", 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  
• Revised oiling and 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  
• M-6051-S331 or M-6051-CP331 head gasket recommended  
• Weighs approximately 195 lbs.  
• Great price and value  
• The foundation for 9.2" deck projects

The all new 351 9.5 deck block for big bore builds!  
• Same as M-6010-BOSS35195 except allows for bigger bore by deleting coolant crossover holes between cylinders
• Finished at 4.120" rough bore. Designed for minimum bore wall thickness .180" @ 4.125"
• 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
• Revised oiling and cooling system passageways
• 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
• Weighs approximately 195 lbs.
• Great price and value
• The foundation for big bore 9.5" deck projects

Ford Racing introduces the all new BOSS 351 9.2 deck block for big bore engine builds!

• Same as M-6010-BOSS35192 except allows for bigger bore by deleting coolant crossover holes between cylinders
• 4.185" bore capacity (sonic check recommended), finished at 4.12" rough bore
• 9.2" deck height, finished at 9.200" plus .010" to .015"
• Maximum recommended stroke 4.00", 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
• Revised oiling and cooling system passageways
• 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
• Weighs approximately 195 lbs.
• Great price and value
• The foundation for big bore 9.2" deck engine projects

• Over 80 lbs. savings over comparable cast iron 351W block
  
• High strength aluminum block, 356-T6 grade aluminum
• Same block used in the popular Ford Racing 427 Aluminum Crate Engines reliably making over 600HP
  
• Splayed 4-bolt, steel billet main caps on 2,3 and 4
• 2-bolt main caps on 1 and 5
• 3.99" bore as delivered, cast iron sleeves bore range 4.00" to 4.125"
• 9.5" deck height, accepts 351W timing chain, timing chain cover and oil pump
• 2.75" crankshaft (351C) main journal diameter. 2.9415"-2.9425" diameter finished main bearing bore
• Lifter bores finished .8753"-.8768"
• 2.2032" - 2.2052" diameter cam bearing bores. Uses cam bearings, part number M-6261-J351/R351
• Maximum stroke 4.250"
• Wet Sump Oiling System
• Weighs approximately 124 lbs.

• 4.180" max bore capacity
• Compacted graphite cast iron material - stronger than grey iron
• 4 bolt maincaps and strengthened structural section
• Billet main caps of 4140 steel
• Can be bored and stroked to produce 434 ci
• Siamese cylinder bores
• Bore range from 4.000" to 4.180"
• Dry sump oiling design
• 2.248" main journal diameters (stock 302 size)
• Weighs approximately 157 lbs (33 lbs lighter than grey iron version)
• For professional NASCAR competition
• Lifter bores semi-finished, ready to hone
• Main bearing bores - must be honed to fit
• Uses common OD cam bearings M-6261-J351
  
• Requires cam plug M-6026-S351 included
• "O" ringed - threaded core and galley plugs included
• 9.125" deck height