GM Chevrolet Performance’s 350 cid 4 bolt mains Vortec cylinder heads valves 1.940 in. intake/ 1.500 in. exhaust. It’s packed with all the features you need to get a reliable 330 hp and 380 lbs.-ft. of torque from a dependable, time-tested combination of GM Performance Parts. Compression ratio 9.6:1, Recommended fuel 92 octane hydraulic flat tappet camshaft lift 0.435 in. intake / 0.460 in. exhaust Cam duration at .050 in. 212 degrees intake / 222 degrees exhaust (Lobe Separation Angle) 112.5 degrees. Components used in this engine are brand new, not remanufactured parts. It comes without an intake manifold, carburetor, flex plate/flywheel, harmonic balancer, water pump or distributor. Special order item 7-10 business days. (Note payment Bank wire transfer only.) Please e-mail for availability.