Overview
Unleash legendary power with the BOSS 302 Engine Block, expertly crafted by Ford Performance Engineers for unmatched strength and versatility. Built from diesel-grade iron, it's your ultimate choice for dominating both track and street.
Features & Specifications
- Ford Performance Engineers have designed the replacement for the legendary BOSS 302 and 351 blocks using the latest technology and manufacturing techniques from both the production and racing worlds.
- 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
- 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
- NASCAR inspired front oil feed on both lifter galleys
- Revised cooling system passageways
- Siamese bore with drilled coolant crossover holes
- 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
- Cast from diesel grade iron – far superior to any Ford OE block ever produced
- Uses common OD cam bearings M-6261-J351
- Unique cam plug M-6026-S351 included
- M-6051-S331 or M-6051-CP331 head gasket recommended
- Compatible with vehicles equipped with the original 302 and 351W block
- Designed to use stock type timing cover, M-6059-D351 recommended
- Retains clutch cross shaft pivot hole
- Original style oil filter location
- Original motor mount boss locations
- Original bell housing pattern
- Weight: approximately 175 lbs
Compatible Cylinder Heads
- X306, X307, X2, C3, D3, Z304DA, Z2, GT40P
NOT Compatible With
- Production 302/351W (GT40P is compatible)
- M-6049-Y302, Y303, X302, X303, X304, X305
Proven performance – used in Ford Performance sealed 347cid race engines and Ford Performance high performance crate engines, a proven winner out of the crate with thousands of laps to demonstrate durability.
Ford Performance BOSS Blocks (PDF)
