We build a 491-hp Vortec/LS engine, but with a lightweight GM aluminum LM4 block and an affordable GM rotating kit.

Project Groundhog, Part 2: Buttoning things up with the installation of heads, valvetrain, and intake on our rescued 2005-era Chevy LS truck engine.

There are plenty of high-powered, performance-oriented LS engines out there. But what about the LS4? How powerful is that particular iteration?

Despite the difference in engine displacement, these two GMC engines are surprisingly comparable in performance - except in one specific area of capability.

The Vortec engine brought a modernized version of the legendary Chevy small-block V8 to GM trucks and SUVs. Here's how to get the best and avoid the worst.