I have had good luck with my KB(s) and wouldn't want to drive the car without it. I had a 1.5 KB on the car for over 40k miles, I upgraded to the 2.2 2 years ago and have about 10k on that. On the 302, with minimal bolt-ons (gears, exhaust, CAI) I dynoed 307 RWHP; 348 RWTQ. I hit 12.9 @ 112...