* Engine Bay Size and Shape: The Fury III's engine bay was designed for the engines available in 1966. Modern engines, especially V8s, are often larger and differently shaped. You'll likely need to modify or replace the firewall, inner fenders, and possibly even the radiator support to accommodate the new engine.
* Mounting Points: Modern engines have different mounting points than classic engines. You'll need custom engine mounts fabricated to secure the engine properly.
* Transmission: The transmission will also need to be compatible with the modern engine and will likely require custom modifications to mate it to the Fury's existing drivetrain (driveshaft, differential, etc.). You might even need a different rear end.
* Wiring Harness: The electrical systems are vastly different. You'll need a custom wiring harness to integrate the modern engine's computer and sensors with the car's existing electrical system, or you might need a standalone engine management system.
* Cooling System: Modern engines often require specific cooling system components and might need a larger radiator than what came with the car.
* Exhaust System: A custom exhaust system will be necessary to fit the new engine.
* Fuel System: Modern engines might require different fuel delivery systems than the original carburetor setup.
In short, while it's *possible*, it's a very complex and expensive project that requires significant mechanical skill, fabrication expertise, and specialized tools. It's not a project for beginners. You'll likely be working with a professional mechanic or fabricator unless you possess considerable experience with automotive engine swaps and custom fabrication.
