I guess I posted too much, lets try again So Ported or Constant? now you know how they work, you can now make the right choice. Where to set your initial, total and Vacuum timing? When you purchase our products we're always here to guide you, it's included in the price. Don't do HALF the job if you want it to live and perform like it's capable of don't think that just the timing plate or just the Ignition Box will do it all, do the whole job and enjoy the power of your Mighty Mopar for years to come.