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Someone wedged an LSX based motor presumably from a Corvette a good ol’ Grumman LLV.

Grumman LLV Postal Service trucks have served in the USPS Postal Service for over 32 years serving as the backbone for mailmen and women. With just Iron Duke four-cylinder engines under the hood mated to a 3-speed Turbo-Hydramatic transmission, power was never its forte.

That’s all but been taken cared of in this situation..

According to Holley LS Fest organizers earlier this week, someone brought out an LS Swapped Mail Carrier that, with its hood closed, looks a lot like the bog standard mail carriers you see roaming around your neighborhood.

Check out some media they dropped for us below.

Details are few at the moment on this one of a kind of vehicle but from what I can see, this is a complete turn-key LS swapped vehicle.

Those with keen eyes will notice the 275 40 17 tires wrapped around Nitto wheels on all four corners. There’s a good amount of rubber to lay some power down.

Those privy to these kinds of swaps in the comments informed other commenters that this swap isn’t all that uncommon if you consider that there are plenty of Chevrolet S-10 LS swapped trucks roaming around at any one time.

The Grumman LLV and Chevrolet S-10 are both related, the Postal truck running on a modified S-10 chassis.

I’m not sure how well this LS swapped postal truck will handle now but one thing’s for certain, in a straight line that LS engine will blow the sliding doors off its own chassis.

Consider that that ol’ Iron Duke could only muster a whopping 90 HP, enough to propel this beast of burden to 60 MPH in 17 seconds and to an eventual top speed of 75 MPH. When you’re delivering mail, you didn’t need more than that.

As mentioned, I can only assume that these Postal Truck modifiers stuffed a fairly potent LS engine under there, perhaps one out of a newer model Chevrolet Silverado.

One thing’s for certain, this Postal truck’s got some proper legs now.

Delivery in two days or less? No problem.

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