Pertronix II/ MSD SS
Using a standard DVM to measure low resistance gives misleading readings. I have a special Ultra Low Ohm meter that is specifically made for sub 1 ohm readings.
If MSD says the coil res is 0.355 ohms, you better believe it. Same with what Pert says.
You could use the MSD coil with their CD box, but risky with the Pert module.