Besides easily made horsepower, a 347's longer stroke means it makes power a little differently. At its most basic, a longer stroke is simply more displacement, and displacement means torque.

This is not a modification for the faint of heart. Once you start taking a Four-Valve, four-cam modular small-block apart, you'll think that the parts will never go back together. Unless you want to ...

The latest GM LS-style engines come stock with free-flowing, rectangular-port heads—they just need a great cam to wake them up. Enter Comp Cams' new LSR series. Available for both late-model one-bolt ...