I read (for what that's worth) that you are looking for a total resistance in the primary circuit between low 2's and 3. This includes coil and ballast resistance added together.........Don't know if it's true.
OK, so let's just go with that logic...it suggests that I'm OK with the 3 ohm resistor coil with the v8. It could be that Pertronix's guidance applies to their particular other peripherals, at least it seems to read that way.