Need help with a misfire
Recently purchased a 78 TA with standard 400. Trying to get on the road. Had a bad hesitation so rebuild carb without issue. Car ran rather smooth after rebuild with good throttle response but not quit right. I could not get the air mixture screws to change engine performance that much and the motor is running rich. So I started looking at the ignition system. Not knowing history of anything on the car, I replaced the plugs, cap and rotor, with little to no change. Than pulled the new plugs to examine. Found most plugs to be copper to tannish color, except 5 and 6. They were a dark black as if they were not firing. At this point I replaced coil, ignition module and wires, again not knowing history of the motor. Again with no change, on what I think are dead cylinders. I think if I get all cylinders firing correctly my carb tuning issue will go away. Any incite on where to go from here would be greatly appreciated. I am out of ideas. Thanks
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