* A completely rebuilt, ready-to-install engine: Expect to pay anywhere from $5,000 to $15,000 or more. The higher end of that range represents a professionally rebuilt engine with high-performance parts.
* A used, running engine in good condition: You might find one for $2,000 to $8,000, but thorough inspection is crucial to avoid hidden problems. Finding a truly good, original, unrestored engine in this price range will be difficult.
* A parts engine (for parts): These can range from a few hundred dollars for a very rough block up to a couple of thousand depending on what parts are salvageable.
* A core (just the engine block): These can be surprisingly expensive, sometimes costing several hundred dollars due to the demand for parts for these engines.
In short, there's no single answer. You need to research prices from reputable sellers specializing in classic Mustang parts. Be wary of deals that seem too good to be true – often, hidden problems inflate the ultimate cost.
