Good question on "when" this happened. Ok, after this last rebuild I was very leary as you can imagine after wiping out so many cams. Given that, it was quite some time before I dared to goose the ole girl. I would say that after putting around town with the car for the first 1k miles I began to feel a bit more confident so I slowly began to push her more and more. At about 2k I felt pretty good. This was around Thanksgiving and we weredriving back and forth every day at least once a day from our house to Daytona Speedway. It was during those trips that I really began to push the car up towards the top end (5k).

The car would run PERFECT up until I would get it up around 4500rpm and higher, it would begin to break up much like a rev limiter. I thought maybe the Pertronix unit had one built in, but later found that not too be true.

Howeve, even though it would "break up" it never backfired and never stalled. Now it seems this problem is happening more often at lower rpms but only when you go to give it a quick slam of the gas pedal. That's when she bogs, spits, sputters and backfires like a mother, then if you back off and let it "catch up" so to speak then it's fine.

Again, the car starts, idles and through first gear all is perfect. It's when you hit second gear all goes down hill if you are really getting on her.

So all in all it's kinda hard to answer the original question about when this all started based on the fact that I baby the crap out this car for the first 2k miles.

Hope this helps a bit more and yes I will post pics of the plugs as well...