1978 Cadillac Seville Automatic 4-door Sedan on 2040-cars

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This 1969 Ford F-100 has a Cadillac CTS-V engine lurking underhood

Something always feels just a little taboo when someone builds a custom and then slots in a powertrain from a rival automaker. That's exactly the case with this modded 1969 Ford F-100 boasting a highly tuned LSA supercharged V8 like from the second-gen Cadillac CTS-V. However, with a claimed 800 horsepower on tap thanks in part to running an estimated 20 pounds of boost, it's easy to get over any bad feelings. Built by Tommy Pike Customs in South Carolina, the truck tries to keep the exterior looking somewhat stock. Although, the jade green and satin gold paint, Quaker State logo, lowered suspension and black wheels immediately suggest something is up. Once the F-100 starts up with its menacing growl, absolutely any doubts of this beast being unaltered are immediately gone. Not so obvious are some tweaks to actually help put all that power down, including disc brakes and independent suspension setups at the front and rear. The video gives some glimpses at a few of Pike's other creations, but the real star here is definitely his mean, green Ford.

Cadillac may not build Elmiraj coupe

Despite the fact that most everyone who has laid eyes on the Cadillac Elmiraj concept coupe loves it, General Motors insiders are still trying to prove the business case to build the car. And it's certainly not a guarantee.
"I want to see this car go into production badly. Very badly," Ed Welburn, GM's Global Head of Design, told Autoblog. But the Cadillac design studio is busier than it's ever been before, and the company is working on prioritizing which cars deserve to get the billion-dollar price tag needed to research and develop a new model.
No matter what happens, Welburn says the car has made its mark on Cadillac

How GM's grueling 24-hour test gets the kinks out of its performance cars

One of the biggest challenges automakers face when designing a high-performance car is making sure that it is both fast and reliable. For General Motors, any car that might be taken to the track by its owner - like the Corvette, Camaro Z/28 (shown above) and the Cadillac CTS-V, for example - undergoes a rigorous and strenuous 24-hour test by engineers at the Milford Proving Grounds, as pointed out by Car and Driver.
We've posted on this topic in the past - on a video showing the Camaro ZL1 being brutalized, for instance - but this article gives a more in-depth look at what actually happens behind the scenes... including what that poor ZL1 went through. Though the test isn't for 24 hours straight, the cars are pushed as hard as possible by some of GM's best drivers with only the brakes and tires replaced frequently.
We don't want to ruin the fun for you, but it is an interesting article that tells just some of what GM does to develop its sports cars. Check out the full article over at Car and Driver for the rest of the story.