WHAT'S IT WORTH? FULL DYNO RESULTS. BONUS TEST-FOUR DIFFERENT 302 INTAKES. Check out this test where I compared stock 5.0L heads to GT40P to AFR 165 heads. How much power do the junkyard P heads add? What happens when you upgrade further to after market heads like the AFRs (lot of good 5.0L heads out there). What about intakes? I compared four Edelbrock intakes, the Performer 289, the RPM Air Gap, the Torker II and the Victor Jr. How does your fasvorite stack up?