Here's what you need to consider:
* Engine Mounts: While likely similar, the engine mount locations *might* be slightly different. This could require modifications to the engine mounts or even the frame.
* Wiring Harness: The wiring harnesses are likely different. You'll probably need to adapt the harness from the 1997 engine to work with the 1998 vehicle's computer system. This is often the biggest hurdle.
* Sensors and Components: Small variations in sensor locations, connectors, or even the type of sensors themselves can exist. You might need to swap over some components from the 1998 engine to the 1997 engine, or vice versa, to ensure everything functions correctly.
* Exhaust Manifold: The exhaust manifold might not bolt up directly.
* Transmission Compatibility: Ensure the transmission from the 1998 Explorer is compatible with the 1997 engine. Generally, this should be fine for the same year range, but it's worth double-checking.
In short: It's *possible*, but it's not a simple bolt-in swap. You'll likely need a good understanding of automotive mechanics and potentially some fabrication skills. It's highly recommended to compare the two engines side-by-side before attempting the swap to identify potential compatibility problems. Failing to do so could lead to significant extra work and expense. Consult a repair manual for both the 1997 and 1998 models to compare specifications.
