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Re: 5.4L Triton...Powerful enough for a Superduty???
What's the axle ratio? 4.1 to 4.5 axles give snappy acceleration with smaller motors..... BUT.... you're going to get lower mileage on the highway; 1 to 1-1/2 mpg lower than if you had a 3.7 axle... and, the engine is a lot busier on the highway. Around town, your driving style has more influence on mileage than anything else.
If you're towing reasonably heavy loads on a regular basis, get the 4.10 at least. If the towing is a very infrequent thing, the 3.7 will do, unless you want to impress your friends by smoking the tires.
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