* Width: The 460 is significantly wider, requiring substantial modification to the frame, firewall, and possibly the inner fenders.
* Length: It's longer, potentially interfering with the radiator and other components.
* Height: The height might also be an issue, especially with the intake manifold and accessories.
* Exhaust: Routing the exhaust system would be a major undertaking.
* Transmission: You'd likely need a different transmission to accommodate the 460's torque.
While some dedicated enthusiasts *have* managed to install 460s in Broncos, it's a very involved project requiring extensive fabrication and custom parts. It's not a simple bolt-in swap. The cost and effort involved far outweigh the benefits for most people.
