[RET_COP]

That means you are close on your tune. I set mine up lean so it surges just a little and then go up 2 jets on the primary. I'm 1 jet size off from getting rid of that Snap Crackle Pop, just the way I like it. I adjust between summer and cold weather. It's not easy reading plugs on a weekend or daily driver.
One day I took my 1 1/2" primaries off and noticed they were black. I cut my exhaust apart and found the mufflers were 2 1/4 ID, I tossed it all away. I put on a pair of Classsic Chambered 3" ID Cobrapacks and 2 3/4" primaries. I ran the car for a few months and removed the primaries, they were Lt Tan to ivory White. Everything was just so backed up, it changed the whole tune and car in general. I now run a Pro-System carb, a Victor Jr. intake, Brodix ported heads and that exhaust. These cars are so light that I haven't lost anything down low that I can feel. I chassis dynoed the car and I was pretty close for tune. Some day Ill buy a A/F meter and really have some fun.
Keep thrashing, it's the best part of owning these cars, we're never bored.
A buddy of mine bought a real nice Shelby GT 500, he parked next to me at a cruise night. He said it was real nice and his wife liked it but it gets boring fast.