In the world of racing and
performance, BIGGER is always
better. Ford Racing gets it -
and that's why it offers BOSS
small blocks in Big Bore
versions. The Ford Racing BOSS
blocks are designed to be a
replacement for the legendary
BOSS 302 and BOSS 351 blocks
using the latest technology
and manufacturing techniques
available. Cast from diesel
grade iron with siamese bores,
thick cylinder walls and
decks, BOSS block strength is
far superior to any Ford
production block ever
offered.
Ford Racing Big
Bore version of the BOSS 302
block makes it simpler and
more economical to build
really BIG small blocks. To
insure the most precise bore
location, concentricity and
integrity, the BOSS Big Bore
blocks are machined an
additional .125" during the
initial block fixturing and
boring stage. With an
unfinished bore size of
4.120", Ford Racing BOSS 302
Big Bore blocks will support
engine sizes up to 363 cubic
inches.
FEATURES:
-
4.125" bore capacity, finished
at 4.115" rough bore. Also
available in standard bore
version, part number:
M-6010-BOSS302
- 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
1979 - 1995 Mustang oil pan
with custom oil pickup tube,
part number:
M-6622-BOSS302
- NASCAR
inspired front oil feed on
both lifter
galleys.
- Revised
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/X30
4/X305 cylinder
heads
- Uses common OD
cam bearings
M-6261-J351/R351
- Uniqu
e cam plug M-6026-S351
included
- M-6051-S331
or M-6051-CP331 head gasket
recommended
- 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-BOSS302
- Retains
clutch cross shaft pivot
hole
- Original Style
oil filter
location
- Original
motor mount boss
locations
- Original
bell housing
pattern
- Weighs
approximately 163
lbs.
- The foundation
for 8.2" deck
projects