Stalling/not running right when hot

That shouldn't need replacing though, correct? So the dizzy I bought should be able to just be dropped right in?

If your ignition module isn't faulty, you don't need to replace it. The dizzy can drop right in. The dizzy comes with a new PIP (as opposed to a fox, where you'd have to install the ignition module or the new dizzy would have come with a new one).