Both of these Mustangs represent what true enthusiast builds are all about. They’re not trailer queens or garage ornaments — they are proper street-driven muscle cars built to be enjoyed. Packed with big cubic-inch stroker engines, upgraded driveline components, modern fuel injection, and carefully thought-out suspension and braking systems, these cars deliver the kind of performance that keeps the classic car scene alive in Perth, Western Australia.

In this feature, we break down what makes each of these Mustangs unique, from their powerful engine combinations to the subtle interior and exterior touches that make them stand out at car shows, cruises, and events like All Ford Day.

Two Very Different Mustangs with the Same Passion

While both cars come from the legendary Ford Mustang lineage, they serve slightly different purposes. Roy has built each car with its own personality and driving style in mind.

The 1967 Mustang Fastback is the aggressive powerhouse of the pair. With a large cubic-inch stroker engine pushing serious horsepower, this Mustang has been built with performance as the priority. Everything from the drivetrain to the cooling system has been designed to handle high horsepower and keep the car reliable in Western Australia’s hot conditions.

On the other hand, the 1965 Mustang Coupe offers a slightly more relaxed but still very capable driving experience. Built to cruise comfortably while still delivering plenty of performance, this Mustang balances classic styling with modern upgrades that make it enjoyable to drive on the street and on longer highway runs.

Together, these two Mustangs show how versatile the platform can be — whether you want a tough street machine or a comfortable cruiser with plenty of punch.

Big Cubic-Inch Stroker Engines

One of the highlights of both Mustang builds is the use of big stroker engines. These high-performance engine combinations dramatically increase cubic capacity and horsepower, transforming the cars into serious performers on the street.

Roy’s builds feature impressive setups including 427 cubic inch and 363 cubic inch stroker combinations, delivering massive torque and strong acceleration. Stroker engines have become extremely popular in classic Mustang builds because they allow enthusiasts to extract modern levels of performance while maintaining the classic V8 character that made these cars famous.

The result is a pair of Mustangs that sound incredible, respond instantly to throttle input, and deliver the kind of driving experience that modern cars simply can’t replicate.

Modern Fuel Injection with Holley Sniper EFI

While these cars retain their classic muscle car character, they also incorporate modern reliability upgrades. One of the most significant is the use of Holley Sniper EFI fuel injection systems.

Electronic fuel injection has become a popular upgrade for classic cars because it dramatically improves cold starts, idle quality, throttle response, and overall reliability. Unlike traditional carburettors, the Sniper EFI system self-adjusts to conditions and requires far less tuning once installed.

For owners who want to actually drive their classic muscle cars regularly — especially in varying weather conditions — this upgrade makes a huge difference.

Built Driveline for Street and Strip

With big horsepower engines under the bonnet, the driveline components must be strong enough to handle the power. Roy’s Mustangs feature robust setups designed for both street cruising and hard acceleration.

Both cars run manualised C4 automatic transmissions, a popular choice for high-powered classic Mustangs due to their durability and ability to handle serious torque.

Power is then sent to the legendary Ford 9-inch differential, widely regarded as one of the strongest rear-end setups ever produced. This combination ensures the cars can handle aggressive launches, spirited driving, and even occasional strip duties without reliability concerns.

Suspension and Braking Upgrades

To match the increased horsepower, both Mustangs have been fitted with upgraded suspension and braking systems.

One of the standout upgrades is the use of Wilwood performance brakes, which significantly improve stopping power compared to factory systems. These high-performance brake setups are essential for any classic muscle car that’s producing modern levels of horsepower.

Upgraded suspension components also help the cars handle better on the street, improving stability, ride quality, and overall driving confidence.

The result is a pair of classic Mustangs that not only accelerate hard but can also corner and stop safely, making them far more enjoyable to drive in real-world conditions.

Cooling Systems Built for Western Australian Heat

Anyone who has driven a classic car in Western Australia’s summer heat knows how important cooling systems are. Roy’s Mustangs have been carefully built with upgraded cooling setups designed to keep temperatures under control even during hot Perth days.

High-capacity radiators, improved airflow, and efficient cooling fans ensure the engines remain stable in traffic, during long cruises, and even when pushed hard.

These practical upgrades are crucial for making classic cars reliable enough for regular use rather than occasional weekend outings.

Interior and Exterior Styling

Beyond performance, these Mustangs also showcase thoughtful styling details that help them stand out.

The 1967 Fastback has a more aggressive visual presence, with classic muscle car lines enhanced by subtle upgrades that emphasise its performance focus.

The 1965 Coupe, meanwhile, retains more of the traditional Mustang elegance while incorporating modern touches that enhance comfort and usability.

Both interiors maintain the classic Mustang feel while integrating upgrades that improve the driving experience, showing that it’s possible to modernise a car without losing its original character.

Driving Classic Mustangs in Perth

One of the best parts of this feature is hearing about what it’s actually like to own and drive high-powered classic Mustangs in Perth’s car scene.

Western Australia has a thriving community of car enthusiasts, with regular cruises, meets, and major events where classic cars take centre stage. From weekend cruises to large events like All Ford Day, these Mustangs are built to be driven, enjoyed, and shared with fellow enthusiasts.

Cars like Roy’s are a perfect example of how the classic car culture continues to thrive — blending traditional muscle with modern reliability upgrades.

Why Classic Mustangs Still Capture Enthusiasts

The Ford Mustang remains one of the most recognisable muscle cars in the world, and builds like these show exactly why.

They combine timeless styling, powerful V8 performance, and endless customisation potential. Whether you’re building a tough street machine, a strip-ready weapon, or a comfortable cruiser, the Mustang platform allows enthusiasts to create something truly personal.

Roy’s 1967 Fastback and 1965 Coupe perfectly demonstrate how two cars from the same lineage can have completely different personalities while still delivering the unmistakable thrill of classic American muscle.

Watch the Full Feature on Aussie Garage

In this Aussie Garage episode, we take you through both builds in detail — exploring the engines, driveline setups, suspension upgrades, cooling systems, interiors, and styling choices that make these Mustangs so special.

If you’re passionate about classic Ford Mustangs, Aussie muscle car builds, street machines, or the Perth car scene, this is an episode you won’t want to miss.

A huge thanks to Roy for sharing both of these incredible Mustang builds with us and giving us a look inside what makes them tick.

Special shoutout also goes to Albert from AST Mechanical in Midvale for helping keep these high-powered classics running perfectly.

So now we want to hear from you — if you had to choose just one, would you take the angry 1967 Fastback or the street-ready 1965 Mustang Coupe?

Let us know in the comments and stay tuned to Aussie Garage for more classic car features, build walkarounds, and Australian car scene coverage every week.

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