Plug-n-play distributor & ignition box

I presently have a mechanical dizzy with an MSD 6AL ignition box. I found a great deal on a pertronix plug and play dizzy with vacuum advance, which is what I'm wanting to upgrade to. The info I've found states that this distributor can be adapted to the ignition box, but doesn't state how. I want t keep the box for the rev limiter. Any insight would be much appreciated!