Here's why:
* Size and Configuration: The 1994 Ranger typically used a 2.3L inline-4 or a 3.0L V6. A V6, even a smaller displacement one, is wider than an inline-4 and will likely be too wide to fit within the existing engine bay. A 1.8L V6 is unusual; most V6s are larger displacement. The 24-valve DOHC design would also add complexity in terms of valve cover and head height, making it even less likely to fit.
* Mounting Points: The engine mounts on the 1994 Ranger are designed specifically for the original engine's dimensions and weight. A different engine would require significant modifications, custom-fabricated mounts, and potentially modification of the frame.
* Transmission Compatibility: While it *might* be possible to adapt the transmission (though not easily), the bellhousing patterns (the place where the transmission connects to the engine) will likely be incompatible, requiring extensive modification or a custom bellhousing.
* Exhaust and Intake: The exhaust and intake systems are designed for the original engine. Significant modification or entirely new systems would be required.
In short, this is a major engine swap that would require substantial fabrication, custom parts, and advanced mechanical knowledge. It's a project far beyond a simple bolt-in replacement. It's far more practical and cost-effective to use a compatible engine from a Ranger, or perhaps a slightly larger, more easily adapted engine.
