Ballast resitor

Ok I put the new coil and cap on, ran the the car up to 2000rpms put a big shop fan in front of the car so that it would not over heat. 92 today, ran for about 20mins start to miss a little grabbed the timing lite found intermiting fire on spark plug 1, check #3 same thing, all of spark plug wires leading to the spark plugs had intermitting fire.turn the car off missing real bad, pulled the coil wire from the cap check for spark, found that it also had intermitting spark,waited 5 mins check again no spark from the coil wire to the cap. still no luck, but it looks real pretty sitting in my barn (LOL).What I did find while the engine was warming up, i check the voltage at the jumper wire for the ballast. found I had 13 volts in and out, check the lead to the battery and it also had 13 volts now is this to much? could this be causing my problem?the car was at a 2000rpm when I checked. thanks for any ideas because I,m out IDEAS..