19433030 Chevrolet Performance 350 Crate Engine 330 HP (Base) Replaces 19420878, 19210007, 19420873, 19431609
330 HP 350 Iron Vortec Heads Base Long Block engine
The 330 horsepower 350 HO doesn't sacrifice power or durability, it just pumps up the value. With its four bolt main block, nodular iron crankshaft, PM steel connecting rods and light but strong cast aluminum pistons, this engine screams durability.
Add to the strong foundation a pair of 64cc Vortec cast iron cylinder heads and a dual pattern camshaft with just a bit of a "lumpy" idle, and you've got the muscle car small block that you've been looking for.
Dressed to impress with chrome valve covers and timing cover, this engine will look great between the fenders of your favorite street rod, muscle car or grass roots racer. The cylinder heads on this great little performer use 1.94" intake and 1.50" exhaust valves that are sprung with 1999 Corvette L3I valve springs. The 64cc chambers yield a healthy, but streetable 9.1 to 1 compression ratio. The cam is a modern dual pattern interpretation of the old '65 to '67 Corvette 327 cam. But with more lift and duration on the exhaust side, it does a better job of clearing exhaust from the combustion chamber.
We also decreased duration and lift ever so slightly on the intake side to build more cylinder pressure. The result is a cam that makes great torque and horsepower with the 350 HO's 9.1 to 1 compression ratio.
Add the new dual plane intake manifold P/N 12496820, 600 cfm carburetor, HEI distributor, torsional damper, water pump and exhaust manifolds or headers and you've got an outstanding muscle motor with a broad, smooth torque curve and an honest 330 horsepower. This manifold has four bolts, not six, to attach it to the cylinder head. Older six-bolt manifolds will not fit the new Vortec heads.
The 350 HO is not intended for marine use, and should only be used in 1975 and earlier pre-emissions street vehicles or any year off road vehicles.
Technical Notes:
Engine ID code is CC. Requires a counterweighted flywheel or flexplate, 10105832, 14088646, 14088650, 14088765, or 12554824. See flywheel chart. Requires torsional damper 6272221 (6.75") or 12555879 (8"). Oil dipstick located on right side. 600 cfm carburetor recommended. Chrome valve covers and timing cover included. Intake manifold, distributor, flywheel, torsional damper, water pump, and exhaust manifolds are not included. Distributor P/N 1104067 or melonized distributor gear P/N 10456413 must be used on all crate engines with steel camshafts.
Service Parts Listing
350 HO Long Block Spec Sheet
350 HO Technical Information
Horsepower ..................... 330 @ 5000 RPM
Torque .......................... 380 Ft. Lbs. @ 3800
Max. Recommended RPM ..... 5500
Compression Ratio ............. 9.1:1
Block ............................ 10105123 Cast iron four bolt with onepiece rear main seal
Crankshaft ...................... 14088527 Nodular cast iron
Connecting Rods ............... 10108688 PM steel
Pistons .......................... 12361371 Cast aluminum
Piston Rings .................... 14089025
Camshaft ........................ 24502476
Lift: .435" I, .460" E.Duration @ .050: 212o I, 222o E.
Timing Chain ................... 14087014
Cylinder Heads ................. 12558060 Cast Iron 64cc Vorteccombustion chambers
Intake Valves ................... 10241743 1.94"
Exhaust Valves .................. 12550901 1.50"
Valve Springs ................... 10212811
Rocker Arms .................... 10089648 1.5 ratio
Valve Lash ...................... Zero
Spark Plugs ..................... R44TS Gap @ .045 (300 HP 350)41-932 Gap @ .060 (330 HP 350)R44LTS Gap @ .045 (330 HP 350)Rapid Fire #8 @ .035
Ignition Timing .................. 10 BTDC @ 700 RPM.
This block is drilled and tapped for clutch linkage.
Service Parts Listing
350 HO Long Block Spec Sheet
Terms and Conditions
Warranty Information
GM Performance Crate Engine Start-up Instructions
