Does HEI require a minimum of 12v to the coil?

[Hoosierman]

As per the title. I did the conversion, charged up my battery to full. At rest it has 13v, under load while cranking it'll go as low as 11.5v. I do have spark (weak) and at both the coil and the module, I have roughly the same voltage while cranking (11.5v).

Thanks.