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PERFORMANCE
GM
PARTS
350HO Deluxe Engine Specifications:
Displacement: ....................................... 350 cubic inches
Bore x Stroke: ....................................... 4.00 inch x 3.48 inch
Compression .......................................... 9.1:1
Block: .................................................... Cast iron, four-bolt intermediate mains
Cylinder Head: ....................................... Cast iron
Valve Diameter (Intake/Exhaust): ... 1.94"/1.50"
Chamber Volume: .................................. 62cc
Crankshaft: ............................................ Nodular iron, 1 piece rear seal
Connecting Rods: .................................. Forged, powdered metal, 3/8" bolts
Pistons: ................................................. Cast aluminum
Rings: .................................................... Moly coated cast iron
Camshaft: .............................................. Hydraulic roller tappet
Lift:
Duration: .......................................... 212° intake, 222° exhaust @ .050" tappet lift
Centerline: ....................................... 109° ATDC intake, 116° BTDC exhaust
Rocker Arm Ratio: ................................. 1.5:1
Timing Chain: ........................................ 8 mm single roller design
Oil Pan: .................................................. 4-quart
Oil Pressure (Normal): .......................... 40 psi @ 2000 RPM
Recommended Oil: ................................ 10w30 synthetic motor oil (after break in)
Oil Filter: ................................................ AC Delco part # PF25
............................................................... Premium AC Delco part # UPF25
Valve Lash: ............................................ 1/8 turn down from zero lash
Fuel: ....................................................... Premium unleaded - 92 (R+M/2)
Maximum Engine Speed: ...................... 5700 RPM
Spark Plugs: .......................................... AC Delco part # MR43LTS
Spark Plug Gap ..................................... .040"
Spark Timing: ........................................ 32° maximum @ 4000 RPM
Firing Order: .......................................... 1-8-4-3-6-5-7-2
Information may vary with application. All specifications listed are based on the latest production information
available at the time of printing.
350HO Deluxe Engine 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 GMSPO SPECIFICATIONS.
.435" intake, .460" exhaust
REV16JL08
PART NO.
DATE
REVISION
GENERAL MOTORS
SERVICE PARTS OPERATIONS
6200 Grand Pointe Drive, Grand Blanc, MI 48439
12487544
7
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