* Motor Mounts: The 454 Vortec will require different motor mounts than the 350. These are not a trivial swap and require sourcing the correct mounts or fabrication.
* Exhaust: The exhaust system will almost certainly need to be replaced or significantly modified. The 454 is a larger engine and will have differently positioned exhaust manifolds.
* Wiring Harness: You'll likely need a new wiring harness or significant modification to the existing harness to accommodate the 454's electrical system. This can be a complex task.
* Transmission: The 454 might require a stronger transmission than the one originally paired with your 350. If you don't change the transmission, you risk premature failure.
* Cooling System: The 454 generates significantly more heat, so upgrading the radiator, hoses, and possibly the water pump might be necessary for reliable cooling.
* Steering Components: Depending on the specific 454 and its accessories, you may encounter clearance issues with the steering shaft or other steering components.
* Brakes: The increased power of a 454 may require an upgrade to your braking system for safe operation.
In summary, while it's *possible* to fit a 454 Vortec, it's far from a simple bolt-in swap. "Minimal modifications" is unlikely. Expect a significant amount of fabrication, custom parts, and potentially professional help to make it happen reliably. Consider the costs involved before starting this project. A professional engine swap shop should be consulted for an accurate assessment and cost estimate.
