A Citation Mustang is a Ford Mustang II with a 2.8-liter V6 engine swap

A Citation Mustang refers to a second-generation Ford Mustang (1974–1978, known as the Mustang II) that has been retrofitted with a Chevrolet Citation engine. The Citation was a compact front-wheel-drive car produced by Chevrolet from 1980 to 1985. The engine swap—typically a 2.8-liter V6 from a Citation—became a popular modification among Mustang II owners because the original Mustang II powerplants were underpowered and unreliable by the standards of the time.

This modification emerged in the 1980s and 1990s as a cost-effective way to improve performance in a car that had earned a poor reputation. The Mustang II itself was widely mocked for its weak engines, poor handling, and departure from the muscle-car identity of earlier Mustangs. Swapping in a Citation V6 offered more horsepower and torque than the stock 2.3-liter four-cylinder or 5.0-liter V8 options available in later Mustang II years, and the parts were cheap and readily available in junkyards.

Key Takeaways

  • A Citation Mustang is a Mustang II with a Chevrolet Citation V6 engine installed, not a factory Ford model or official trim level.
  • The swap was done by individual owners and mechanics, not by Ford, and represents an aftermarket modification rather than a production variant.
  • Citation engines were chosen because they were affordable, more powerful than original Mustang II engines, and parts were widely available in the used market.
  • This modification is now considered a piece of automotive history and hobby culture, with some examples becoming sought-after by collectors of modified Mustang IIs.

Why owners chose the Citation engine over other swaps

The Mustang II was already unpopular when it left the factory. Its 2.3-liter four-cylinder produced around 88 horsepower, and even the optional 5.0-liter V8 was strangled by emissions controls and produced only 139 horsepower in its final year. For a car that weighed nearly 3,000 pounds, these numbers were disappointing. Owners who wanted to restore performance had several options: rebuild the original engine, find a used 5.0 V8 from a later model year, or look for something different altogether.

The Citation V6 became attractive because it was plentiful and cheap. Millions of Citations were built, and many ended up in junkyards by the 1990s. A used Citation engine, transmission, and related parts could be sourced for a fraction of the cost of a proper 5.0 V8 swap. The 2.8-liter V6 produced around 145 to 160 horsepower depending on the year, which was a meaningful step up from the four-cylinder and competitive with the weak 5.0s available in Mustang II years. The engine also fit in the Mustang II engine bay with modifications, though the swap required custom motor mounts, fuel system work, and electrical rewiring.

How common Citation Mustangs are today

Citation Mustangs were never common, and they are rarer now. The swap was a grassroots modification performed by individual owners and small shops, not a widespread factory option or even a well-documented aftermarket kit. No manufacturer produced Citation Mustang conversion packages, so each swap was essentially a one-off project tailored to the builder's skills and budget.

Most Citation Mustangs from that era have either been scrapped, parted out, or converted back to original engines by subsequent owners. Some survive in the hands of Mustang II enthusiasts and collectors who view the swap as a legitimate piece of automotive history—evidence of how owners improvised to save cars that the market had written off. Online forums dedicated to Mustang II restoration occasionally feature Citation Mustang builds, but they represent a small fraction of surviving Mustang IIs.

How a Citation Mustang compares to a stock Mustang II

A stock Mustang II with its original engine is significantly slower and less responsive than a Citation Mustang. The original 2.3-liter four-cylinder feels sluggish under acceleration, and the five-speed manual transmission (if equipped) does little to compensate. Fuel economy was the priority in the 1970s, not performance, and it shows.

A Citation Mustang trades some of that fuel economy for noticeably better acceleration and mid-range power. The V6 engine is also generally more reliable than the aging four-cylinder engines found in many surviving Mustang IIs. However, a Citation Mustang is still not a performance car by modern standards. It will not outrun a stock 1960s Mustang, and it certainly will not compete with a modern compact sedan. The appeal is relative: it is a meaningful improvement over what came from the factory, and it represents the resourcefulness of enthusiasts who refused to let the Mustang II fade away entirely.

The legal and practical challenges of owning a Citation Mustang

Engine swaps in older vehicles are generally legal, but the rules vary by state and depend on when the car was built and when the swap was performed. Most states do not require emissions testing for vehicles older than a certain year (often 1975 or earlier, though this varies), which simplifies ownership of a modified Mustang II. However, a Mustang II from 1974–1978 may still be subject to inspection in some states, and a non-original engine could trigger questions during registration or inspection.

Insurance can be another complication. Some insurers will not cover a vehicle with a non-original engine, or they may charge higher premiums if they discover the modification. It is worth disclosing the swap to your insurer before purchasing a Citation Mustang, because failing to do so could void coverage in the event of a claim. Resale value is unpredictable: some buyers view the Citation swap as a clever solution and a conversation piece, while others see it as a bastardization of a Mustang and prefer original or properly restored examples.

How to identify a Citation Mustang

Identifying a Citation Mustang requires looking under the hood and checking the engine block itself. The Citation V6 is a distinctive engine with a different shape and layout than the original Mustang II powerplants. The engine block will be stamped with Chevrolet identification numbers, not Ford numbers. If you are considering buying a Mustang II and want to know whether it has been modified, ask the seller directly and request documentation of the work performed.

Visual clues can help: a Citation Mustang may have custom motor mounts, non-original radiator hoses, or a different intake manifold than a stock Mustang II. However, a skilled builder can make the swap look nearly factory, so visual inspection alone is not reliable. The best approach is to start the engine and listen, then ask to see service records or receipts from the work. A reputable seller will be transparent about the modification and may even have photos from the build process.

Frequently Asked Questions

Is a Citation Mustang worth more or less than a stock Mustang II?

A Citation Mustang is typically worth less than a well-restored original Mustang II, because collectors and purists prefer factory authenticity. However, it may be worth more than a neglected or heavily rusted stock Mustang II that needs expensive restoration. Value depends on the quality of the swap, the condition of the rest of the car, and the buyer's priorities.

Can I swap a Citation engine back to the original engine?

Yes, if you have access to an original Mustang II engine and the necessary parts. However, reversing the swap is often more expensive than performing it in the first place, because you will need to source a complete original engine, fuel system, and electrical components. Many Citation Mustang owners keep the swap because the cost of reverting outweighs the benefit.

Will a Citation Mustang pass a state inspection?

This depends on your state's inspection rules and the age of the car. Most states do not inspect vehicles older than 1975 or 1980, so a Mustang II may not require inspection at all. If your state does inspect older vehicles, the Citation engine may pass as long as emissions systems are in place and functional. Contact your local DMV or inspection station to confirm the rules in your area.

What other engines have been swapped into Mustang IIs?

The Citation V6 is one of several options. Some builders have used 5.0-liter V8s from later Mustangs, small-block Chevrolet V8s, and even turbocharged four-cylinder engines. The Citation swap was popular because of cost and availability, but it was never the only choice.