I have cobra kit car with a 79 ford 460 in it nothing to fancey, i am running a mallory distributor with a msd blaster coil , reason why is, i was running the mallory coil without a balast resistor and she cracked open. The car starts right up, i pulled the wires and checked the spark and it was cracking prety good, i ran till it warmed up and then is started missing, i pulled a wire to check the spark and it was no ware near the spark it was at when i first started it. The coil is maybe 2 months old. What you think.