* Engine Mounts: The engine mounts are specific to the engine and year. You'll likely need custom motor mounts or mounts from a different GM car that used a similar engine.
* Transmission: The transmission needs to be compatible with the engine you choose. You might need a new transmission, driveshaft, and potentially even a modified rear end depending on the power of the new engine.
* Wiring Harness: The wiring harness for your 1986 Cutlass Supreme is designed for the 3.8L V6. You'll need a wiring harness compatible with your chosen V8, or extensive rewiring. This is often the most complex part of the swap.
* Exhaust System: You'll need a custom exhaust system built to fit the new engine.
* Cooling System: The cooling system may need upgrades to handle the increased heat output of a V8.
* Computer Control: Many later V8s are computer-controlled and may require significant modifications to integrate with the 1986 Cutlass's existing system or use an aftermarket computer system.
350 (5.7L) Engines that *could* potentially fit (with significant work):
Many GM 350 small-block V8s from the late 70s through the early 90s are candidates, *but there's no guarantee of a perfect fit without modification*. You'd likely look at engines from cars like:
* Camaro/Firebird: These often used the 350, making them a reasonable starting point for parts compatibility research.
* Monte Carlo/Grand Prix: Similar chassis to the Cutlass, increasing the chances of finding suitable mounts.
* Chevy Trucks: Truck engines are often readily available, but may require additional modifications due to differences in accessories and mounting points.
Important Considerations:
* Research is Crucial: Before starting, thoroughly research engine swaps for your specific year and model. Forums dedicated to GM muscle cars and classic car restoration are invaluable resources.
* Professional Help: Unless you have significant mechanical experience, this is a project best tackled with the help of a mechanic specializing in engine swaps.
* Cost: A successful engine swap can be expensive, involving parts, labor, and potential unforeseen issues.
Instead of focusing on just finding a 350, I recommend searching for "1986 Cutlass Supreme V8 engine swap" in online forums and communities to learn from others who have done this before. This will give you a much more realistic idea of the challenges and specific parts you'll need.
