Will Corvette LS3 engine fit in c5 Corvette?

Yes, an LS3 engine will fit in a C5 Corvette, but it's not a direct bolt-in swap. While both are LS-series engines, there are differences that require some modifications and potentially additional parts. You'll likely need to address things like:

* Engine Mounts: The LS3 might require different engine mounts or modification to existing ones to fit properly.

* Wiring Harness: The wiring harness from the LS3 might not be directly compatible with the C5's system, requiring modification or a custom harness.

* Exhaust System: The exhaust system will likely need modification or replacement to accommodate the LS3.

* Accessory Drive: The accessory drive components (alternator, power steering pump, etc.) may require adjustments or replacements due to differences in placement or mounting points.

* Transmission: While the transmission itself *might* be compatible depending on what transmission is already in the C5, the bellhousing might need adaptation or replacement.

In short, while feasible, it's not a simple swap. It's a project that requires mechanical knowledge and expertise, potentially necessitating professional help or significant research and planning.