How To Rebuild Your Ford V-8 351C-351M-400-429-460.pdf - Index of

4291460-Standard 429 and 460 cylinder
heads are essentially the same on a yearto-year
basis. As a result, they are 100-
percent interchangable. '68-'71 heads
use the cast-iron, rail-type rocker arms
and positive-stop studs. Chamber volume
is 75.8~~. Valve sizes remained the same
at 2.084 inches and 1.653 inches throughout
the 4291460's production. Pivotguided,
stamped-steel rocker arms replaced
the rail rockers in 1972, and the combustion-chamber
size was increased to
91.4cc, making the 4291460 a lowcompression
emissions engine. In 1974,
the 460 combustion chamber was further
increased to 96.2~~ as the last significant
change to this cylinder head.
429CJ and SCJ-CJ heads produced prior
to Nov. 1, '69 and SCJ heads are identical.
They have 73.5~~ combustion chambers
and 2.245-inch and 1.725-inch intake and
exhaust valves. Rocker arms are stampedsteel,
pushrod-guided and adjustable, the
same as the 351C Boss and HO engines.
CJ heads built after Nov. 1, '69 use nonadjustable
pushrod-guided rocker arms.
Positive-stop rocker-arm studs are used. tion-chamber volume was 89cc and valve
Otherwise, they are the same as the sizes were reduced to 2.197 inches and
earlier heads.
429 and 460 Police-1971 429 Police
1.653 inches. Pushrod-guided stampedsteel
rocker arms and positive-stop studs
cylinder heads are essentially the same as are retained. The last Police head, prothe
late 429 CJ heads with non-adjustable duced from 1975 on, is identical to the
rocker arms. Combustion-chamber sizes standard passenger-car head.It has 96.2~~
were increased to 91.5~~ in 1972 for combustion chambers, 2.084-inch and
lower compression, otherwise the '71 and 1.653-inch diameter valves and non-
'72 heads are the same. In 1973 when the adjustable stamped-steel pivot-guided
460 became the Police engine, combus- rocker arms.
Common single-piece spring retainer shown alongside two-piece retainer, or retainer and
sleeve used with '79 and later 351 M/400 exhaust valves. Retainer-and-sleeve design
promotes valve rotation as does multi-groove keeper.
Engine
351C-2V
351C-4V
335 SERIES CYLINDER-HEAD SPECIFICATIONS
351C-CJ
351C-4V
Year
Clearance
Volume (cc)
Compression
Ratio
70-74
76.2
9.5: 1
70-71
62.8
11.0:l
71
75.4
9.0:l
72-73
75.4
9.0:l
74
78.4
8.7:l
7 1
66.1
11.7:l
72
75.4
9.2:l
75-80
78.4
8.0: 1
71
78.4
9.0: 1
72-80
78.4
8.4: 1
~~~~~~~
Valve-Head
Oia. IIE (In.)
Valve-Stem
Diameter (In.)
2.0411
1.654
0.342
2.1901
1.710
0.342
2.1901
1.710
0.342
2.1901
1.710
0.342
2.0411
1.654
0.342
2.1901
1.710
0.342
2.1901
1.710
0.342
2.0411
1.654
0.342
1.654
0.342
1.654
0.342
All 335 Series engines use stamped-steel rocker arms. Boss and H.O. rocker arms are adjustable. They are stabilized by
guide plates which are located under screw-in rocker-arm studs.
351C
Boss
351C
H.O.
351M
400
Engine
Year
Clearance
Volume (cc)
Compression
Ratio
Valve-Head
Dia. (In.) IIE
Valve-Stem
Diameter (In.)
Rocker-Arm
Type
429
68-71 72-
75.8 91.4
10.5: 1-2V 8.5: 1
11.O:l-4V
2.0841 2.0841
1.653 1.653
0.342 0.342
Cast-
Iron,
Stamped-
Steel,
Non-Adj. Non-Adj. Non-Ad~.~
1 Pushrod gltide plates used under screw-in rocker-arm studs.
2 CJ is non-adjustable after 11-1-69.
385 SERIES CYLINDER-HEAD SPECIFICATIONS
429
Police
71-72
73.5
11.3:l
2.2451
1.725
0.342
Stamped-
Steel,
429CJ.
SC J
71-72
73.5
11.3:l
2.2451
1.725
0.342
Stamped-
Steel,
A~J.~,
460
68-71 72-73 74 -
75.8 91.4 96.2
10.5:l 8.5:l 8.0: 1
2.0841 2.0841 2.0841
1.653 1.653 1.653
0.342 0.342 0.342
Cast- Stamped- Stamped-
Iron, Steel, Steel,
Non-Adj. Non-Adj. Non-Adj.
460 Police
73-74 75-78
89 .O 96.2
8.6: 1 8.O:l
2.1971 2.0841
1.653 1.653
0.342 0.342
Stamped- Stamped-
Steel, Steel,
N~n-Adj.~ Non-Adj.
Charts illustrate 335 and 385 series cylinder-head evolution. Much of the complexity is related to rocker-arm design changes and emission-standard
compliance.
PARTS 37