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Spark Plugs / Spark Plug Wires:
The 350/290 HP engine does not come with spark plugs. P/N 19302744 (AC R45TS) is recommended for HEI ignition applications.
When installing the engine in a vehicle originally equipped with a small block V-8 with HEI ignition, standard replacement
sparkplug wires can be used. High performance 8mm diameter wire sets with the Chevrolet Bow Tie logo are available
from Chevrolet Performance for custom installations. The Chevrolet logo wire set is P/N 12361051 (90° spark plug boots).
The 90° spark plug boot sets are recommended for routing the spark plug wires under the exhaust headers.
Rocker Covers:
The 350/290 HP engine comes equipped with stamped steel, flange mount rocker covers. A wide variety of valve cover choices
are available at your Chevrolet Performance dealer or visit us on the web at www.chevroletperformance.com.
Crankcase Ventilation (PCV):
Crankcase ventilation is necessary to prevent oil leaks. If a PCV system is used, it must have a one way check (PCV) valve
and also a source of fresh air. P/N 06487779 (AC Delco CV774C) PCV valve is recommended and a filtered fresh air breather
in the opposite valve cover should be used.
350/290 HP Service Parts List
Part #
Qty
12453170
1
Bearing, Cm/Shf #1
12453171
2
Bearing, Cm/Shf #2 And #5
12453172
2
Bearing, Cm/Shf #3 And #4
3877669
6
Bolt/Screw, Cr/Shf Brg C
12561388
10
Bolt/Screw, Cr/Shf Brg C
12531215
4
Bearing, Cr/Shf Upr/Lwr (.001)
89060460
1
Bearing, Cr/Shf Upr/Lwr Thrust (.001)
10120990
3
Bearing, Cr/Shf Upr/Lwr (Std)
93438649
2
Head Asm, Cyl (w/ Vlv)
93438648
AR
Head, Cyl (Mchg)
10241743
8
Valve, Int
12564852
8
Seal, Exh Vlv Stem Oil
94666580
16
Spring, Vlv
3814692
AR
Stud, Vlv Rkr Arm Ball (.003" O.S)
3815892
AR
Stud, Vlv Rkr Arm Ball (.013" O.S)
24503856
32
Key, Vlv Stem
10212810
8
Seal, Int Vlv Stem Oil
14003974
16
Cap, Vlv Spr
12550909
8
Valve Asm, Exh
10105117
2
Gasket, Cyl Hd
10168525
14
Bolt/Screw, Cyl Hd (Long)
10168526
4
Bolt/Screw, Cyl Hd (Medium)
10168527
16
Bolt/Screw, Cyl Hd (Short)
93426651
1
Crankshaft
10121044
2
Seal Asm, Cr/Shf Rr Oil
106751
2
Key, Cr/Shf Balr
10108688
1
Rod Asm, Conn
461372
2
Bolt/Screw, Conn Rod
3866766
2
Nut, Conn Rod
93422884
8
Piston Asm, (w/ Pin)
350/290 HP Engine Long Block Specifications
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
Name
REV 21AP17
Part #
Qty
12523924
16
10066039
1
14082340
1
10066041
1
10089606
1
12550042
1
93442037
1
3998287
1
3764554
1
10046007
1
12554553
2
3951600
1
10046160
1
14090906
1
10108435
1
3896962
1
14088784
1
14088785
1
14088783
1
9424877
3
14095256
16
5234200
16
12557390
16
10089648
16
93438953
1
93438952
1
3877670
8
3933964
2
10066063
16
19172591
PART NO.
DATE
Previous Revisions are Archived
21AP17
Revisions - Rusty Sampsel
Name
Bearing, Conn Rod (Std)
Pan Asm, Oil
Reinforcement, Oil Pan
Reinforcement, Oil Pan
Gasket, Oil Pan
Shaft, O/Pmp Drv
Pump Asm, Oil
Screen Asm O/Pmp
Retainer, O/Pmp Drv Shf
Bolt/Screw, O/Pmp
Pin, O/Pmp Loc
Tube Asm, Oil Lvl Ind
Cover, Eng Frt
Seal Asm, Cr/Shf Frt Oil
Gasket, Eng Frt Cvr
Camshaft Asm
Sprocket, Cr/Shf
Sprocket, Cm/Shf
Chain Asm, Tmg
Bolt/Screw, Cm/Shf Spkt
Rod Asm, Vlv Push
Lifter Asm, Vlv
Nut, Vlv Rkr Arm
Ball, Vlv Rkr Arm
Cover Asm, Vlv Rkr Arm
Cover Asm, Vlv Rkr Arm
Reinforcement, Vlv Rkr A
Gasket, Vlv Rkr Arm Cvr
Arm, Vlv Rkr
SHEET
REVISION
7
21
OF
AUTH
N/A
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