1. Planning and Parts Gathering:
* Engine: Source a suitable 350 small-block Chevy. Consider the year, condition, and accessories (intake manifold, carburetor/fuel injection, etc.). A 350 from the same era (or a slightly later model year) will generally be the easiest swap.
* Transmission Compatibility: Verify your existing transmission (automatic or manual) is compatible with the 350. While often interchangeable, there might be differences in bellhousing bolt patterns or flexplate/flywheel requirements.
* Engine Mounts: You might need new engine mounts, or potentially modify existing ones, to fit the 350 properly. The 305 and 350 are similar, but there can be subtle differences.
* Wiring Harness: The wiring harness might need modification or replacement, particularly if dealing with different fuel injection systems.
* Exhaust System: The exhaust manifolds or headers will likely need to be replaced or adapted to fit the 350.
* Cooling System: Consider the cooling system requirements of the 350. You may need a different radiator or cooling fan depending on the specifics of your engine and vehicle.
* Other Potential Needs: Consider potential needs such as oil pan clearance, starter, and alternator compatibility.
2. Removal of the 305:
* Disconnect Battery: Always disconnect the negative battery terminal before starting any work.
* Drain Fluids: Drain the engine oil, coolant, and transmission fluid (if applicable).
* Disconnect Components: Disconnect all electrical connections, fuel lines, vacuum lines, and other components connected to the engine.
* Remove Accessories: Remove accessories like the alternator, power steering pump, and air conditioning compressor.
* Unbolt the Engine: Carefully unbolt the engine mounts and lift the engine out of the engine bay using an engine hoist.
3. Installation of the 350:
* Mount the Engine: Install the new engine mounts and carefully lower the 350 into the engine bay using an engine hoist.
* Connect Components: Reconnect all the accessories, electrical connections, fuel lines, and vacuum lines.
* Exhaust System: Install the appropriate exhaust system.
* Wiring Harness: Connect or modify the wiring harness as needed. This is often the most complex part of the swap.
* Transmission: Connect the transmission. Ensure proper alignment and torque specifications.
* Cooling System: Connect and fill the cooling system with the correct coolant.
4. Final Checks and Testing:
* Fluid Levels: Check all fluid levels (oil, coolant, transmission fluid, power steering fluid, brake fluid).
* Wiring: Double-check all wiring connections.
* Start the Engine: Start the engine and listen for any unusual noises. Check for leaks.
* Road Test: Once everything seems okay, perform a careful road test.
Important Considerations:
* Vehicle-Specific Information: Consult a repair manual specific to your 1995 vehicle. This will provide valuable information on torque specifications, wiring diagrams, and other crucial details.
* Computer Control: Modern vehicles use computers to control engine functions. You may need to address compatibility issues with the engine control unit (ECU) and the vehicle's computer system.
* Emissions Compliance: Be aware of emissions regulations in your area. The swap might require modifications to meet legal requirements.
This is a very simplified overview. Each step involves numerous sub-steps and potential complications. Again, this is a challenging project best left to experienced mechanics unless you possess extensive mechanical skills and proper tools. Improperly performed engine swaps can result in significant damage to your vehicle.
