[undy]

I'm still not convinced it's not a fueling issue, lean mixture=high exhaust temps. At this point in time I'd recommend a AFR monitored chassis dyno session. I'd be very curious to know what the AFR was when your mis occured. Worst case scenario, you lose 75 bucks worth of dyno time. If nothing else it'll help you dial in the carb and tell you how much of the real deal you're putting to the ground.