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The 7.3-liter is based on what Ford’s Mike Goodwin calls the “old-fashioned” pushrod design compared to modern overhead cam engines. Because the camshaft is built into the block, the hump can be smaller and lighter, which is a benefit for racers, especially of the drag racing variety. Ford’s push rod unit uses a cast iron block with aluminum cylinder heads and a composite manifold, although it’s not yet clear how the Mega-Zilla might differ. Presumably, it will be lighter and, of course, more powerful; the formula just hasn’t been released at this point.
As these mills are placed under the hood of the hot rods, there will certainly be a considerable aftermarket. There’s a control pack that lets you put the Godzilla crate motor in pretty much any vehicle, like an old F100 pickup, vintage Bronco, or maybe even a cart that would scare passers-by at Target. It’s hard to imagine the Mega-Zilla will be any different as people love the original for its super versatile design.
YouTuber Revan Evan and former Ford Performance boss Brian Wolfe discovered by modifying a 7.3-liter that they could squeeze it into a Fox-body Mustang and push horsepower to 780-plus without a boost. In fact, Godzilla is narrower in the hips than the 4.5-inch Coyote.
Want more power and grunt? You can even fit a 3.0-liter supercharger developed by Whipple on the big-block engine, boosting Godzilla to 700 horsepower and torque to 750 pound-feet. If we’re lucky, Ford might just offer the Mega-Zilla with a factory fan option. The possibilities for custom modifications are seemingly endless, and the race is on to see how far custom tuners can push it to the edge until the next monster is available.
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