[Greg Dunn]

Careful on advancing a cam to lower your power curve. Rule of thumb is every 4 degrees of advance lowers your power curve 500 rpm (so if your pc is 3000-6500, 4 degrees advance lowers it to 2500-6000). I did exactly this on a 306 with the idea that lower would be better on a "f" cam w/ 1.6 rockers (.512 lift) - the gain was more than offset by the loss of exhaust gas scavenging per a chassis dyno. I'm switching back. Lesson learned.