Ford Authority

Ford Mustang Shelby GT350 Prototype Is 7.3L Godzilla V8 Test Bed: Video

Back in March, Ford Authority spies spotted a very unusual-looking Ford Mustang Shelby GT350 prototype that was equipped with a massive, odd-looking hood. Considering the fact that quite a few next-gen, S650 Mustang prototypes were seen out and about during that time, it led many to believe that this car was some sort of powertrain mule for the new pony car. Turns out, that was at least partially correct, as this particular Ford Mustang Shelby GT350 prototype is actually a testbed for the Ford 7.3L V8 Godzilla powerplant, as YouTuber REVan Evan recently discovered.

More specifically, the GT350 is a testbed for the Ford’s new manual transmission control pack and engine crate combination, the former of which is set to launch later this year via the Ford Performance catalog. Ford already sells a complete Godzilla powertrain package in that same catalog that includes a control pack with a PCM and Ford Performance calibration, an electronic throttle pedal, Bullitt airbox, an 87mm Bullitt throttle body adaptor, a FEAD kit, a starter, index plate, and a production Ford Super Duty 10R140 transmission and torque converter, transmission cooler, shifter and cable assembly, and mounting hardware.

In this case, Ford used the Shelby GT350 to develop these new parts, but in reality, the 7.3 is intended to fit in any vehicle thanks to the fact that it comes as a complete package. Ford only chose to utilize this GT350 to develop its new parts because it was “laying around,” for lack of a better term, but the end result is undeniably cool, if not lacking a bit in terms of forward visibility.

Those interested in swapping the Godzilla in an S550 Mustang will be interested to know that it does fit quite well and bolts right in, though as we can see here, it’s a bit tall. However, the automaker is working on a new intake manifold that doesn’t have the same upswept throttle neck that will make it much easier to fit in vehicles like this newer pony car.

We’ll have more on the Mustang very soon, so be sure and subscribe to Ford Authority for more Ford Mustang news and ongoing Ford news coverage.

Brett's lost track of all the Fords he's owned over the years and how much he's spent modifying them, but his current money pits include an S550 Mustang and 13th gen F-150.

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  1. John

    We need a 7.3L option in the S650, please.

  2. Ben

    Please Ford, make the mustang with a 7.3

  3. Louie Gonzalez

    Any application. Nice. I’ve got an 88 Ford Festiva laying around that needs a healthy alternative to its current powerplant

  4. truth speaker

    Ford will NEVER make a factory 7.3 mustang, don’t get your hopes up.

    1. Nonspecific Motors (GM)

      Maybe, but what about the rumored 6.8 V8 based off of the 7.3 V8 as reported by the UAW that Ford was going to build for the F150 and the Mustang. The Modular V8s are high revving and produce high emissions because of that. It’s only proper that the last V8 F150 and Mustang have a pushrod V8. They would be based off of the 7.3 so hardly any engineering costs, and Ford could go ahead and cut the costly Mod motors. Kill the 5.0 car. 5.0 truck, 5.2 car, 5.2 truck, and 6.2 truck engines for just for a 6.8 car, 6.8 truck, and 7.3 truck. A 6.8 hybrid could be the last GT500/Raptor R.

  5. Marty

    You won’t see anyone buying the automatic control pack for this crate engine swap for a car as they only offer it with the 10R140 which is a massive truck tranny. Ford performance came up way short with the 7.3 crate engine not offering it with an automatic control pack for the 10R80 like they do for the Coyote. Shame.

  6. JohnIL

    Sadly, with the EPA requiring unrealistic fleet MPG averages. All we will mostly see in production vehicles is tiny turbo engines. The big blocks will be only for workhorse trucks which require all that muscle. The CAFE standards will kill any ideal of these engines in any mass-produced vehicle other than workhorse trucks.


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