Relatively Straightforward (Higher Cost, Less Work):
* LS-series V8 (e.g., LS1, LS2, LS3, LSX): This is a popular choice for many GM cars due to their power, relatively lightweight design, and readily available parts. However, it's a significant undertaking. You'll need a custom engine harness, likely a new transmission (a T56 Magnum or 4L60E are common choices), custom mounts, driveshaft, and potentially significant modifications to the chassis to accommodate the larger engine. This is expensive but offers a substantial performance upgrade.
More Complex (Lower Initial Cost, More Work):
* Supercharged/Turbocharged 3.8L Buick V6 (Series I or Series II): This is a more readily available option within the GM family. These engines can produce significant power with forced induction and are relatively compact, potentially making installation easier than an LS swap. You would still need a custom harness, potentially a different transmission, and custom mounts. However, sourcing the engine and associated parts might be cheaper than an LS swap.
* 3.4L Supercharged Buick V6: Another GM option that’s a bit more readily available than the 3.8. Similar to the 3.8, it offers a good power-to-weight ratio but still requires considerable fabrication.
Things to Consider:
* Transmission: Your current transmission is unlikely to handle the increased power of any of these swaps. You'll need a stronger transmission to match the engine.
* Wiring Harness: You'll almost certainly need a custom wiring harness, or at least significant rewiring.
* Engine Mounts: Custom engine mounts will be required.
* Driveshaft: A new driveshaft, or modification to the existing one, will likely be needed.
* Cooling System: You'll probably need to upgrade the cooling system to handle the increased heat output of the new engine.
* Exhaust System: A custom exhaust system will be necessary.
* Computer Tuning: Proper tuning is crucial to ensure the engine runs correctly and reliably.
Recommendation:
For someone with limited experience and a moderate budget, a supercharged 3.8L Buick V6 might be the most reasonable option. While still challenging, it might be slightly less involved than an LS swap and still offers a significant performance boost. However, if you have deep pockets and access to skilled mechanics or are very comfortable with fabrication, the LS swap will offer the most rewarding performance.
Before you begin, thoroughly research the specifics of your chosen swap. There are many forums and online resources dedicated to engine swaps, especially for GM vehicles. Talk to experienced mechanics and consider your skill level before committing to such a project.
