ETA 5-31-23!!!The BOSS 351, 9.5 deck block for big bore engine 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" (Sonic check recommended for bores greater than 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 NASCAR inspired front oil feed on both lifter galleysRevised 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 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-BOSS302M-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 patternWeighs approximately 197 lbs. Great price and value The foundation for big bore 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.