* Older trucks (generally pre-1988): More likely to accommodate a 454 with minimal modifications, or possibly none at all, depending on the specific truck and the modifications already present.
* Newer trucks (post-1988): More challenging. Modern trucks often have tighter engine bays, making a 454 a very tight fit, if it fits at all. Significant modifications, including bodywork, may be needed.
Factors to consider:
* Truck frame: The frame's size and design will determine how much space is available.
* Firewall clearance: The 454 is a large engine; you'll need sufficient clearance between the engine and the firewall.
* Exhaust system: Finding an exhaust system that clears everything will be a major challenge.
* Transmission: The transmission choice will impact the fit.
* Accessories: Power steering, alternator, and other accessories might require modifications to fit.
* Body modifications: In many cases, modifying the truck's body (like trimming or notching) might be necessary to accommodate the large engine.
In short: While it's *possible*, it's not a simple "bolt-in" swap for most Chevy trucks, especially newer models. You'll likely need mechanical expertise and possibly custom fabrication. Research specific to the year and model of your truck is crucial before attempting this swap.
