CMW Trucks - 1947 - 1972 Chevy Truck Parts


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350 HO Base

The GM Performance Parts 350 HO Base trim level crate engine offers you all of the same great performance capability and internal components as the Chevy crate engine 350 HO Deluxe (and 350 HO Turn-Key) including chrome valve covers and timing cover, but it comes without the intake manifold, carburetor, water pump, balancer, distributor, and damper—parts that you likely have in your garage already. However, these bolt-on components are available from GM Performance Parts, or you can use the 350 HO Base as the foundation for the custom engine of your own design.

NOTE: Intended for pre-1977 street vehicles and all off-road vehicles. Not intended for marine use.

Possible Applications*

  • Replace that V-6 with some all-American Chevy crate engine V-8 muscle
  • Restore your musclecar with a little bit more than stock

*Applications have not been validated. They are merely suggestions of how you might enjoy your GM Performance Parts crate engine. Some applications may affect engine warranty. See specific warranty information. Some applications may not be emission legal; check state and local ordinances.

Part Number: 12486041
Engine type: Chevy small-block V-8
Displacement (cu in): 350
Bore x stroke (in): 4.00 x 3.48
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'c1 intake / 222'c1 exhaust
Cylinder heads (P/N 12558060): Vortec iron; 64 cc chambers
Valve size (in): 1.94 intake / 1.50 exhaust
Compression ratio: 9.1:1
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): 14"
Recommended fuel: 92 octane
Ignition timing: 10'c1 BTDC @ 700 rpm
Maximum rpm: 5500

Chevy Performance 350 HO Base engine image

Part #:12486041

Installation Notes

  • Comes with counterweighted flexplate for automatic transmission; requires counterweight flywheel for manual transmission.
  • Has right-side oil dipstick.
  • Intended for pre-1977 street vehicles and all off-road vehicles.
  • Not intended for marine applications.
  • Requires fuel line from fuel pump to carburetor.
  • Fuel pump pressure is pre-set, fuel pressure regulator not required.
  • Some assembly required.