Chevy 350 HO Base Crate Engine

The 350 HO Base crate engine offers great performance at a great price. Internal engine parts are quality components and includes accessories like chrome valve covers and timing cover. Chevy 350 base HO engines come with no intake, carburetor water pump, balancer, distributor, and damper so you can set yours up how you like. This engine is very flexible and is a great base engine to build on. Try the GM Performance 350 HO base engine for your vehicle.

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

Possible Applications*

  • Add some V8 Muscle to an older street car or truck
  • Restoration of an older vehicle with a little more HP

*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.

350 HO TECH SPECS:
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 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.