See All 22 Photos You see, a larger displacement LS—say, a 427-inch LS7—is going to be ... top the short-block we chose a pair of GM LSX-LS3 rectangular port aluminum heads (PN 19201805).

Apparently, they couldn’t make a rocket engine work because power comes from GM’s 6.2L V8 LS3, which originally saw duty in the C6 Corvette, Chevy SS, and Chevy Camaro SS. You can sign up for ...

The simplest way to determine the truth would be to have someone build a time machine so we could go back to 1969 and put a GT500 on a dyno. A more complicated alternative would be to get a ...