* Mounting Points: The engine blocks are different sizes and shapes, meaning the mounting points won't align. You'd need custom motor mounts.
* Transmission: The minivan engine likely came with an automatic transmission, while your Ranger has a manual. Adapting the manual transmission to the minivan engine would require a custom bellhousing and potentially other significant transmission modifications. This is a very complex task.
* Computer System: The 3.0L from the minivan will have its own computer system (ECM). Integrating this with the Ranger's wiring harness will be incredibly challenging. You'd likely need a stand-alone engine management system.
* Exhaust System: Exhaust manifolds and the rest of the exhaust system are specific to each engine. You'd need a custom exhaust.
* Drive Shafts: The length and configuration of the driveshafts may not be compatible.
* Accessories: The placement of accessories (alternator, power steering pump, etc.) might differ, requiring custom brackets.
While technically *possible* with significant fabrication and mechanical expertise, it's not a practical swap. The time, cost, and skill required far outweigh the benefits. Finding a used 2.9L or a compatible upgrade (like a 302 V8, though that's a much larger undertaking) would be far more sensible.
