350 HO Base

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

All the same, important, powerbuilding elements as the Turn-Key and Deluxe versions, but it comes without an intake manifold, carburetor or distributor.

350 HO Base Specs.

Engine Type: Chevy Small Block V8
Weight: 575
Horse Power: 330
Torque: 380
Displacement (cu in): 350
Bore x Stroke (in): 4.000 x 3.480
Block (P/N 10105123): Cast-iron with 4-bolt Main Caps
Crankshaft (P/N 14088526): Nodular Iron
Connecting Rods (P/N 10108688): Powdered Metal Steel
Pistons (P/N 12514101): Cast Aluminum
Camshaft Type (P/N 24502476): Hydraulic Flat Tappet
Camshaft Lift (in): .435 intake / .460 Exhaust
Camshaft Duration (@.050 in): 212° Intake / 222° Exhaust
Cylinder Heads (P/N 12558060): Vortec Iron; 64cc Chambers
Valve Size (in): 1.940 intake / 1.500 Exhaust
Compression Ratio: 9.1 Nominal
Rocker Arms (P/N 10089648): Stamped Steel
Rocker Arm Ratio: 1.5:1
Water Pump (P/N 88894341): Cast Iron, long Style
Flexplate (P/N 14088765): 12.750"
Recommended Fuel: 92 Octane
Ignition Timing: Base 10° BTDC, 32° Total
Maximum Recommended rpm: 5,500
Balanced: External

350 HO Base Warranty Detail PDF

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