In the first test, we used a Comp Cams 270H grind with .224/.224 at .050 duration and .470/.470-inch lift. Lobe separation of 110 degrees provided a relatively smooth idle and good low-speed torque. The cam swap saw a dual-pattern camshaft, spec'd out with a .222/.230 at .050 duration and .470/.480-inch lift. This cam, with a 112-degree lobe separation, gave the engine a broader, flatter torque curve and also increased top-end power. Plus, it's mild enough to support a docile 750-rpm idle speed.