You're very welcome!
As for going with the dual output coil - yes, there's nothing to be gained over the single output, except if you already have one or need it now and that's all you've got. Just wanted you to know that a dual output coil will work fine with single plug heads as long as the second port is run to ground. I know it works because I ran that way for a thousand miles until I replaced them with single output coils. I am curious if the dual output coil draws more amperage, set up that way, than the single.