Coil/ballast resistor draw drop a whole volt?

I swapped out the glass fuse holder for a blade fuse holder (12-gauge). That was the final piece of the puzzle. Everything up to the same voltage now. I guess the aftermarket glass fuse holder (small contacts held to the end of the fuse by a spring) doesn't make a good enough contact for the strain of the ignition system. When I turn on the key, I get over 12.6 volts at all connections. Coil (through the ballast) is 7.4 volts. Even the hot at the alternator is 12.6. I also have a functioning electric choke.