[428street]

This is the response I received from Pertronix:

Ok, then you have the Ignitor. With the Ignitors we have been removing the
resisters with these coils for years. With great results and have
experienced very little failures. The reason why we say don't remove the
resister in the Ignitor instructions is we aren't sure what coil the
customer might have on the car. So to be on the safe side we ask the
customer to keep the resister inline to better protect the Ignitor. In your
case since we are familiar with this coil we would give you the option to
keep the resister or remove the resister.

I normally suggest not running a resister because it allows the coil to
produce more energy. The down side is the coil will run a little hotter. So
if your coil isn't mounted in a location that gets air moving over it you
might what to think about adding a resister. Or if you are mounting the coil
on its side make sure the terminals are running parallel will the ground.