* Exhaust System: The 454's exhaust manifolds or headers will likely need to be custom-made or heavily modified to clear the frame and other components.
* Steering Components: The 454 is larger and heavier, potentially interfering with steering linkage. Adjustments or modifications may be necessary.
* Transmission: You might need a different transmission, depending on the 454's configuration and the existing transmission in the truck. The 350's transmission might not be strong enough to handle the 454's torque.
* Motor Mounts: While the bolt pattern might be similar, you'll likely need motor mounts designed specifically for a 454 in a 1979 Chevy truck, or possibly fabricate custom mounts.
* Radiator: A larger radiator might be necessary to handle the increased cooling demands of the 454.
* Wiring and Electrical: The 454 might require different wiring harnesses or modifications to the existing system.
In short, it's doable, but it's not a straightforward bolt-in swap. It'll require mechanical expertise and possibly fabrication skills. Expect to invest significant time and money.
