While a 3.8L V6 is what came stock, the Firebird's chassis can accommodate much larger V8 engines, like those from Chevrolet's LS series (LS1, LS2, LS3, etc.). These swaps are common and relatively straightforward for experienced mechanics, but they require significant work including:
* Engine mounts: New engine mounts are absolutely necessary.
* Transmission: You'll likely need a different transmission to handle the increased power.
* Wiring harness: Adapting the wiring harness to the new engine is a complex task.
* Exhaust system: A new exhaust system is required.
* Driveshaft: May need lengthening or shortening.
* Cooling system: Potentially upgrades to the radiator and cooling fans.
* Brakes: Upgrades may be needed to handle the increased power.
In short, while larger engines *can* fit, it's far from a simple bolt-in affair. It's a substantial project requiring mechanical expertise and significant investment. The 3.8L is just the starting point; many enthusiasts aim for much larger and more powerful engines.
