Here's why it's not straightforward:
* Size Differences: The 460 is significantly larger and heavier than the 400. This means potential interference with the firewall, steering components, and other chassis parts.
* Mounting Points: While the engine mounts might be somewhat compatible, precise alignment and potentially custom fabrication might be necessary.
* Exhaust System: The exhaust manifolds and system will almost certainly need to be replaced or significantly modified to accommodate the larger engine.
* Transmission: The transmission used with the 400 might be compatible with the 460, but its ability to handle the increased torque of the larger engine needs to be considered. A stronger transmission might be needed.
* Accessories: The alternator, power steering pump, and other accessories might require relocation or replacement due to physical interference.
In short: It's possible, but highly unlikely to be a simple bolt-in swap. It will require a significant amount of work, potentially including custom fabrication, and a thorough understanding of engine swaps and mechanical work. You'd likely need to consult with experienced mechanics or enthusiasts familiar with this specific swap to determine feasibility and the extent of modifications required.
