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Ford Racing Catalogue Web

ENGINE BLOCKS FORD RACING BOSS CYLINDER BLOCKS Ford Racing 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. The BOSS block capability has been proven around the world – both on the track and on the street. By preserving many of the dimensions and features from the original 289-351 blocks, the BOSS blocks are compatible as replacements for use in just about any vehicle that used a Windsor-style engine. Cast from diesel grade iron and designed with added material in key areas, BOSS block strength is far superior to any Ford OE block ever produced. • Nodular iron main caps – splayed 4-bolt pattern on 2, 3, 4, mains. 2-bolt main on first and fifth main caps • Finished lifter bores – uses stock size 302/351 lifters • Machined to accept factory hydraulic roller lifter guides and lifter guide retainer • NASCAR®-inspired revised oiling and cooling system • Siamese bore with drilled coolant crossover holes to aid cooling – except on big bore versions • Increased bulkhead material and deck thickness (.500" - .560") • Threaded core and galley plugs (straight thread port plugs with O-ring) • Head bolt thread engagement are moved lower in the block to minimize bore distortion and thus requires special length 1/2" head bolts • Designed for Ford Racing M-6049-X306/X307/C3/D3/Z304DA or Yates®-style Cylinder Heads. Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 Cylinder Heads • Uses common OD cam bearings • Unique Cam Plug M-6026-S351 included • 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 Pickup Tube M-6622-BOSS302 • Retains clutch cross shaft pivot hole • Original style oil filter location – M-6731-FL1A recommended • Original motor mount boss locations • Original bellhousing pattern Block M-6010-BOSS302 M-6010-B302BB M-6010-BOSS35192 M-6010-B35192BB M-6010-BOSS35195 M-6010-BOSS351BB Bore Size as delivered 3.990" - 3.995" 4.115" - 4.120" 3.990" - 3.995" 4.115" - 4.120 3.990" - 3.995" 4.115" - 4.120" Siamese Bore Yes Yes Yes Yes Yes Yes Cross Drilled Yes No Yes No Yes No Maximum Bore Size 4.125" Sonic test for greater 4.125" Sonic test for greater Sonic test for greater than 4.125" than 4.125" than 4.125" Maximum Stroke 3.400" 3.400" 4.000" 4.000" 4.250" 4.250" recommended Main Bearings Main bearing Main bearing Main bearing bore Main bearing bore Main bearing bore Main bearing bore bore same same as same as same as as stock 302 same as as stock 302 as stock 302 stock 351 Cleveland stock 351 Cleveland stock 351 Cleveland stock 351 Cleveland Deck Thickness .500" - .560" .500" - .560" .500" - .560" .500" - .560" .500" - .560" .500" - .560" Head Bolt Size 1/2-13 UNC Lifter Bore Size .8753" - .8768" .8753" - .8768" .8753" - .8768" 8753" - .8768" .8753" - .8768" .8753" - .8768" Rear Seal Type 1-piece rear seal 1-piece rear seal 1-piece rear seal 1-piece rear seal 1-piece rear seal 1-piece rear seal M-6701-B302 M-6701-B302 M-6701-B351 M-6701-B351 M-6701-B351 M-6701-B351 Weight 175 175 195 195 205 205 Maximum 363 cubic inches 363 cubic inches 427 cubic inches 427 cubic inches 454 cubic inches 454 cubic inches Displacement Recommended Parts Head Gaskets M-6051-S331 M-6051-R351 M-6051-S331 M-6051-R351 M-6051-S331 M-6051-R351 M-6051-CP331 M-6051-CP331 M-6051-CP331 M-6051-R351 M-6051-R351 M-6051-R351 M-6051-B341 M-6051-B341 M-6051-B341 Cam Bearings M-6261-J351 or M-6261-R351 Head Stud Kit Head Stud Kit M-6014-Z304, M-6014-BOSS Head Bolt Kit Head Bolt Kit M-6014-BOSS Rear Main Seal M-6701-B302 M-6701-B302 M-6701-B351 M-6701-B351 M-6701-B351 M-6701-B351 For important information about the proper usage of performance parts, please see page 14. See pages 286-292 for important safety, emissions and warranty information. www.fordracingparts.com 99


Ford Racing Catalogue Web
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