Factors that Determine Compatibility:
* Engine Mounts: The engine block itself may have slightly different mounting points depending on the specific year. While generally compatible, you might need to adapt the mounts or use mounts from the donor truck.
* Transmission: The transmission must be compatible. If you're swapping the entire engine/transmission assembly, this is less of a concern. If swapping just the engine, the transmission must match.
* Wiring Harness: This is the biggest hurdle. The 1994 F-150's fuel injection system is computer-controlled. A late-model 302 will likely have a different computer and wiring harness. You'll either need to swap the entire harness from the donor truck (a very complex undertaking), or potentially adapt the existing harness to the new engine's sensors and injectors – which is also very challenging and may require custom fabrication or a wiring specialist.
* Accessories: The alternator, power steering pump, and air conditioning compressor may or may not be interchangeable. Their mounting points might differ, requiring adapters or replacement parts.
* Exhaust System: The exhaust manifolds and pipes will probably need to be modified or replaced to fit the new engine.
In short: While physically fitting the engine is possible, the wiring harness and accessory compatibility are the primary challenges. It's a significant undertaking, best suited for someone with experience in automotive electrical systems and engine swaps. It's rarely a simple bolt-in swap. You might be better off rebuilding your existing 302 or finding a used, complete engine and transmission assembly from a similar-year truck to minimize complications.
