First the facts. 1978 308GTB Using crane XR700's instead of points etc Recent carb work done (cleaned and rebuilt at dealer with appropriate kits) Now the problem. The car has been hesitating slightly when given gas, however when you floor it, it doesn't seem to hesitate. It also doesn't seem to miss when reving the engine. I am assuming that the carbs just need a minor adjustment. However today while driving....aggresively and in extreme heat (it was over 33C with high humidity) I get the flashing (slow down) 5-8 cylinder light come on. I immediately stop.....but don't see any glowing cats, so I continue home in a much more leisurely pace. Slow down Lights do not come on again during the 1/2 hour drive home. (kept revs down, but speed up to keep the fresh air running through the car. I come home and attack the spark plugs in the back bank to see if there is an issue. 1st plug looks OK but has a little oil around the white part of the plug, the end looks OK as in no excessive deposits. So my question is......what's the problem....or do I even have one. Is it most likely just the carb kits that weren't adjusted properly....or do I have a back bank of plugs that aren't on at all times. Perhaps the wires are bad, or the extentions. Looking for any kind of feed-back before I head back to the dealership.