Ford Racing M6010BOSS302 - Ford Racing Engine Blocks Details

Small Block

The legend is reborn with the new Boss 302 block! Stronger than the original and ideal for both high horsepower and endurance applications.
• 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"
• Designed with optimized cylinder wall length for stroker applications up to 3.5" with no grinding or clearancing. (Depends on crank/rod manufacturer)
• 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 175 lbs.
• Great price and value
• The foundation for 8.2" deck projects
• Proven performance - used in our sealed 347cid race engines, a proven winner out of the crate and thousands of laps before rebuild.