GM Performance GM12496963 Chev Bb Zz502 Base Engine With Alloy Heads

If you want big block power for your ride, but want to have a say in the final product, Chevrolet Performance has the solution. Their 502 c.i.d. long/short block engine assemblies can be configured to deliver all of the muscle you want. The heart of these powerhouses is the same short block that GM uses for their 502 c.i.d., 502 hp bruiser. So you know that they can crank out the power. Chevrolet starts with a Gen VI 4-bolt main block with a one-piece rear main seal and priority oiling for the main bearings. To that, they add an externally balanced, forged crank that's shot-peened and magnafluxed, forged-steel "dimple" connecting rods, forged-aluminum pistons, a single-roller heavy-duty timing chain set, and a hydraulic roller camshaft. The cam has 0.527 in. of intake lift and 0.544 exhaust lift, with 110 degrees of lobe separation. Duration at 0.050 in. of lift is 224 degrees for the intakes, and 234 for the exhausts. These long blocks come complete with a powdercoated cast-aluminum timing cover (will not accommodate double-row chains), aluminum cylinder heads and valve covers, a 6 qt. truck-type oil pan (will not fit Chevelle, Camaro, Nova, or Impala), a 14 in. flexplate, and an 8 in. harmonic balancer.

• Engine Assembly Style: Long block
• Crate Engine Cylinder Head Material: Aluminum
• Assembled: Yes
• Engine Balance: External
• Intake Manifold Included: No
• Cylinder Heads Included: Yes
• Carburetor Included: No
• Throttle Body Included: No
• Distributor Included: No
• Oil Pan Included: Yes
• Valve Covers Included: Yes
• Timing Cover Included: Yes
• Water Pump Included: No
• Harmonic Balancer Included: Yes
• Flexplate Included: Yes
• Flywheel Included: No
• Air Cleaner Included: No
• Spark Plugs Included: No
• Spark Plug Wires Included: No
• Computer Included: No
• Wiring Harness Included: No
• Rear Main Seal Style: 1-piece
• Quantity: Sold individually.
• Notes: This engine is not designed, nor intended to be used in any marine applications. Designed for pre-1976 street vehicles or any off-road vehicle. Clutch linkage bosses are drilled and tapped, plus includes a provision for a mechanical fuel pump.