I. Foundation & Internal Components:
* Rebuild vs. Resto vs. Performance Build:
* Rebuild: Focuses on restoring the engine to factory specifications, using new gaskets, seals, and possibly rings and bearings. Relatively inexpensive and maintains originality.
* Restoration: Similar to a rebuild, but with extra attention to detail and possibly NOS (New Old Stock) parts to maintain factory correctness. Can be very expensive depending on part availability.
* Performance Build: This is where you can significantly increase horsepower and torque. This involves upgrading many components, and the cost can escalate quickly.
* Block:
* Original Block: Assess its condition carefully. Cracks, excessive wear, or damage might require replacement. Consider machining costs if it needs work.
* Replacement Block: A good option if your original block is damaged or you want a clean slate. Finding a good used block might be cheaper than a new one.
* Crankshaft:
* Stock Crankshaft: Rebuild with new bearings and polishing.
* Forged Crankshaft: Stronger and can handle more power than a stock crank, but more expensive.
* Connecting Rods:
* Stock Connecting Rods: Rebuild with new bushings and bolts.
* Forged Connecting Rods: Stronger and more durable than stock rods. Essential for higher RPM and higher horsepower applications.
* Pistons:
* Stock Pistons: Re-ring existing pistons if they are in good condition. This is a cost-effective option for a rebuild.
* High-Compression Pistons: Increase engine power, but require higher-octane fuel. Be aware of potential detonation issues.
* Forged Pistons: Stronger and can handle higher RPM and boost, better suited for performance builds.
* Rings: Always replace piston rings during a rebuild, regardless of the piston choice.
* Bearings: Always replace main and rod bearings during any rebuild or performance build.
* Camshaft:
* Stock Camshaft: Maintain a smooth, reliable engine.
* Performance Camshaft: Increase horsepower and torque, but may require tuning and might affect drivability (e.g., less low-end torque). Choose a camshaft profile based on your intended use (street, drag racing, etc.).
II. Cylinder Head:
* Rebuild: Refacing, valve job, new valve guides, springs, and seals.
* Porting and Polishing: Improves airflow, increases horsepower, but adds cost.
* Aftermarket Heads: Consider aluminum heads for weight reduction and increased performance, although this is a significant upgrade.
III. Other Components:
* Intake Manifold: Choice depends on carburetion (single, dual, etc.) and desired performance. An Edelbrock Performer RPM is a popular choice.
* Carburetor: Single or multiple barrel carbs. Holley and Edelbrock are popular choices. Carb selection heavily impacts performance and drivability.
* Valvetrain: Rockers, pushrods, lifters. Upgrading to roller rockers can reduce friction and improve performance.
* Ignition System: Upgrade to a performance ignition system for improved spark and reliability. Electronic ignitions are far more reliable than points.
* Exhaust System: Headers are a common performance upgrade. Choose headers based on your application and budget.
* Oil Pump: Ensure it's in good working condition or replace with a high-volume pump for performance builds.
IV. Budget:
The cost can range from a few hundred dollars for a basic rebuild to many thousands for a high-performance build. Budget carefully and prioritize your needs.
V. Professional Help:
Unless you have significant engine building experience, consider getting help from a professional engine builder. They can provide expert advice, perform critical machining tasks, and ensure proper assembly.
This is a significant undertaking. Research thoroughly, determine your budget and goals, and choose components wisely. Consider speaking with experienced engine builders for personalized advice tailored to your project. There are many online forums and resources dedicated to small-block Chevy engines that can provide further assistance.
