Engine not running good

Mike, don't pull the dist. Check your timing against what you "know" you had set last. A big change in timing would tell you if the cam drive slipped a tooth. the dist. itself CAN NOT get "a tooth off."

Do both idle screws have an affect? Did you blow out the passages in the carb with some pressurized carb cleaner?

Take your dist. cap off, and wrench the engine ccw/ cw until the rotor just moves. This will give you an idea of the slack in the chain. Anything more than 10* movement of the timing mark is too much.