Here's why it's complex and what needs consideration:
* Engine Size and Configuration: The Aurora engine is significantly larger and heavier than most engines found in Cutlass Supremes, especially older models. This will require significant modifications to the engine bay, possibly including firewall modifications, custom mounts, and potentially even structural reinforcements.
* Transmission Compatibility: The Aurora's transmission (likely a 4T65-E or similar) will need to be compatible with the Cutlass Supreme's transmission mounts, driveshaft, and rear differential. This may require significant adaptation or a complete transmission swap.
* Wiring Harness and Electronics: The Aurora's engine control system (ECM) is far more sophisticated than what was in older Cutlass Supremes. You'll need to either adapt the existing wiring harness, which is extremely challenging, or install a complete Aurora wiring harness, meaning extensive rewiring of the vehicle.
* Cooling System: The Aurora's larger engine will require a more robust cooling system, potentially necessitating upgrading the radiator, hoses, and water pump.
* Exhaust System: The exhaust system will likely need to be completely custom-fabricated to fit the Aurora engine.
* Fuel System: Fuel injectors, fuel pump, and fuel lines may need to be upgraded or replaced to accommodate the Aurora's requirements.
* Power Steering and other accessories: The power steering pump, alternator, and other accessories may need modification or replacement to fit the new engine and its mounting location.
In short, while technically feasible, this engine swap is a major project best left to experienced mechanics with extensive fabrication skills and a deep understanding of automotive electrical systems. It's not a simple bolt-in swap. The cost and time involved could easily exceed the value of the vehicle. You'd be better off researching a more compatible engine swap within the Oldsmobile family or other readily available GM engines.
