350 HO Base Forget rebuilding! Our 350 HO is assembled with all-new parts and high-flow heads, giving you more power than just about any production-spec Small-Block ever installed at the factory: 333 hp and a satisfying 381 lb.-ft. of torque. It’s affordable power with dependability you can count on.
A cast-iron block with four-bolt main caps is the foundation for the 350 HO, which is topped with iron Vortec heads fitted with 1.94/1.50-inch valves. Its durable rotating assembly has aluminum pistons delivering a 9.0:1 compression ratio, while a hydraulic flat-tappet camshaft requires no periodic lash adjustments.
TECH SPECS Part Number: 19210007 / 19420873 Engine Type: Chevy Small-Block V-8 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 ): Forged steel 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 Cylinder Heads (P/N 12558060): Vortec iron; 64cc chambers Valve Size (in): 1.940 intake / 1.500 exhaust Compression Ratio: 9.0:1 nominal Rocker Arms (P/N 10089648): Stamped steel Rocker Arm Ratio: 1.5:1 Maximum Recommended rpm: 5,100 Balanced: External
INSTALLATION NOTES • Has right-side oil dipstick • Designed for pre-1976 street vehicles or any off-road vehicle • Not intended for marine applications